Windows Vista in Boot Camp/10.5.2 - Right click missing, audio device issue

I used to use Parallels Desktop for Mac 3.x with Tiger (10.4) and Windows XP Home (on Boot Camp) and everything was working just fine.

I recently upgraded both my Mac OS X (10.5.2) and Boot Camp windows (Windows Vista Ultimate) in that order. After installing the boot camp drivers in Windows Vista, everything is working fine in boot camp Windows too.

When I log in through Parallels, I have no right-click capability and there is an icon in the systray which says that there is no audio output device. I have tried to understand what may be causing the problem, and could not find a clear resolution.

I tried installing Parallels Tools manually and even after the restart after that, it did not seem to work.

Please advise on how to resolve this issue.