Are you sure that you are tuned to the right frequencies/PIDs?
Try a re-scan. I know that some of the premium PW channels have been re-organised in the not too distant past.
Other than that, can't understand the problem.
If you have a FreeCAM you could try entering the plainkeys directly into the CAM. PlainKeys (and PlainMaster Keys) for PW are published all over the place. See, eg:
http://www.sat-key.com/sat-key/irdetoopkeys.htm.
If you have a hex file that once did work, just edit the keys into it manually - at least then you can be sure.
Finally, here's a usually reliable source of files:
Phill's forum:
http://www.phillsfiles.com/
Direct link to the 16/oct STRSH Irdeto file held there:
http://www.phillsfiles.com/attachment.php?postid=633
Direct link to the 22/oct Cardmanie Irdeto file held there:
http://www.phillsfiles.com/attachment.php?postid=721
Both above files (for goldwafer) purport to work for PW.
2old