thanx evrybody..
the problem is being solved...
the issue was jet audio was not supporting few video files...
now comes the resolution...
few days back i format my computer ...but jet audio was still working cos it was installed on other drive..so i started to find out the things from the root level..
i install jet audio again on my computer on the same location....still no results...
then i delete(manually) the files of jet audio from installed folder and again install jet audio on same location..now each and everything is working fine on my jet audio..
again much appriciated for all of your efforts..and we shud now CLOSE this thread.
JJ...