It sounds as though your download was corrupted. Try downloading again, maybe using a different browser.
tanks for your answer.
I download a pack with chrome and now it work
Mine still says its invalid. This feature is the primary reason I drop-kicked six bennies to upgrade to CS5. Does anybody know if they have any plans on fixing this thing?
Aiee!! Okay, I misread the post where it said download it again with a different browser! My bad!!
I did find out what the real problem is, however: the culprit browser (what else? MSIE!!) likes to give the little guy an extension of MXP while the file's extension should actually be ZXP.