This could be related to the instrument software currently installed on your instrument.  Check to see what software version is currently installed on your instrument. For a MSO/DPO3000, should have software V2.16 or greater For a MSO/DPO2000, should have software V1.31 or greater Instrument software can be downloaded from Tek.com, under the "Support" tab.  Search for your instrument model to locate the most current version.