new model question

![qq20140317175028](https://f.cloud.github.com/assets/4987195/2434755/826de182-adb9-11e3-913d-bba4d82c06d7.png)

the finish button is disabled all the time,what wrong?

OS:CentOS
Pydev : 2.7.0.20121100419
Eclipse Standard/SDK
Version :Kepler Service Release 2
Build id :20140223-0627