Exhibit 12.1

Computation of

Ratio of Earnings to Fixed Charges



|                                                                                                                                                                       |      |                         |         |      |  |   |         |   |  |      |         |   |      |   |         |   |  |   |         |  
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---- | ----------------------- | ------- | ---- |  | - | ------- | - |  | ---- | ------- | - | ---- | - | ------- | - |  | - | ------- | -
|(amounts in thousands)                                                                                                                                                 |      | Year Ended December 31, |        
|                                                                                                                                                                       | 2006 |                         |         | 2005 |  |   | 2004    |   |  | 2003 |         |   | 2002 |  
|Loss before income taxes, extraordinary loss and cumulative effect of adoption of and change in accounting principles                                                  |      | $                       | (10,742 | )    |  | $ | (23,445 | ) |  | $    | (44,158 | ) |      | $ | (37,446 | ) |  | $ | (95,890 | )
|Equity in net losses of equity method investees                                                                                                                        |      |                         |        |      |  |   |        |   |  |      |        |   |      |   | 1,933   |   |  |   | 3,405   |  
|                                                                                                                                                                       |      |                         |         |      |  |   |         |   |  |      |         |   |      |   |         |   |  |   |         |  
|Loss before equity in net losses of equity method investees, income taxes, extraordinary loss and cumulative effect of adoption of and change
in accounting principles |      |                         | (10,742 | )    |  |   | (23,445 | ) |  |      | (44,158 | ) |      |   | (35,513 | ) |  |   | (92,485 | )
|                                                                                                                                                                       |      |                         |         |      |  |   |         |   |  |      |         |   |      |   |         |   |  |   |         |  
|Plus fixed charges:                                                                                                                                                    |      |                         |         |      |  |   |         |   |  |      |         |   |      |   |         |   |  |   |         |  
|Interest expense                                                                                                                                                       |      |                         | 2,047   |      |  |   | 4,623   |   |  |      | 6,103   |   |      |   | 6,945   |   |  |   | 7,254   |  
|Amortization of costs related to indebtedness                                                                                                                          |      |                         | 2,308   |      |  |   | 5,521   |   |  |      | 6,792   |   |      |   | 1,171   |   |  |   | 1,095   |  
|Estimated interest factor in rent expense (1)                                                                                                                          |      |                         | 482     |      |  |   | 391     |   |  |      | 455     |   |      |   | 443     |   |  |   | 576     |  
|                                                                                                                                                                       |      |                         |         |      |  |   |         |   |  |      |         |   |      |   |         |   |  |   |         |  
|Total Fixed Charges                                                                                                                                                    |      |                         | 4,837   |      |  |   | 10,535  |   |  |      | 13,350  |   |      |   | 8,559   |   |  |   | 8,925   |  
|                                                                                                                                                                       |      |                         |         |      |  |   |         |   |  |      |         |   |      |   |         |   |  |   |         |  
|Adjusted loss                                                                                                                                                          |      |                         | (5,905  | )    |  |   | (12,910 | ) |  |      | (30,808 | ) |      |   | (26,954 | ) |  |   | (83,560 | )
|Fixed charges                                                                                                                                                          |      |                         | 4,837   |      |  |   | 10,535  |   |  |      | 13,350  |   |      |   | 8,559   |   |  |   | 8,925   |  
|Deficiency in earnings to cover fixed charges                                                                                                                          |      | $                       | (10,742 | )    |  | $ | (23,445 | ) |  | $    | (44,158 | ) |      | $ | (35,513 | ) |  | $ | (92,485 | )
|                                                                                                                                                                       |      |                         |         |      |  |   |         |   |  |      |         |   |      |   |         |   |  |   |         |  
|Ratio of earnings to fixed charges                                                                                                                                     |      |                         | *       |      |  |   | *       |   |  |      | *       |   |      |   | *       |   |  |   | *       |  

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|* | Calculation not meaningful as ratio is less then 1.
|- | ---------------------------------------------------

|(1) | The interest factor in rent expense is estimated as one-third of rental expense.
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