Your Windows file association is incorrect. If you haven't already I
suggest you try rebooting as this sometimes fixes problems with Windows
file associations.
There are two ways to fix the problem. Track down and fix the Windows file
association or set Agent to launch vuplayer directly.
Windows Explorer has its own private file associations. To fix the Windows
file association I need more info. Exact Windows version, eg. WinXP pro
sp3? What exactly you did to associate flac? What happens when you enter a
flac filename in a cmd window? Etc.
To set Agent to launch vuplayer directly you need to add a MIME type. Go to
"Tools -> Options -> URL and MIME settings -> MIME Types" and press the
"Add..." button. The Type is audio and the subtype is x-flac. OK the
dialog. It should be selected in the top box. In the Extensions box add
flac. In the Application box browse to the vuplayer then add " around it
and a space then "%1". This will cause Agent to ignore the Windows file
association and launch vuplayer itself.
--
Carroll Robbins