vista loses optical drives after system sleeps

I did a search on this issue and found a mention of it on the Windows
Support site (http://support.microsoft.com/kb/929734/en-us) which mentions a hot fix, which I did by calling MS and
having them email me a file to install on my system. I also did the
registry tweak also mentioned on the MS support site. Neither of
these "fixes" work. After a reboot my optical drives are recognized
by the OS and work fine...it's just after the system sleeps that the
are not in "my computer" or my "device manager".

I removed the drives from device manager and rebooted to let Vista find them but that did not fix the issue either.

Thanks!