> I'm currently using HTTrack (ver 3.32-2) and has a 
conflict 
> with the Acrobat plug-in in IE (ver 6.0). The problem has 
> occured since I installed the HTTrack.

Maybe this is a conflict with the button that HTTrack adds 
to IE?  Perhaps try to uninstall the button or disable it 
(not sure how, as I never installed that button).