Can't open desk folders with Left Click

When I try to open a desktop folder by left clicking on it
I get the following message:
Explorer caused an error in WMP DXM.DLL. i click on OK and
it takes me back to the desktop but now some of my taskbar
icons have disappeared.
I can open the folders by right clicking on them and then
selecting "Explorer" but obviously something has gone
wrong with my system. Help

This problem seems to be the result of a damaged Windows Media Player 9
install and using Windows Explorer's web view rather than classic view. So,
as a first suggestion, try reinstalling WMP9.

Zachd from Microsoft recently posted in the windowsme.multimedia newsgroup the
following reply to a poster experiencing similar problems to those you are
seeing.
"Hm. Do you get the chance to send a crash report? If so, there may be a
crash bucket number that it might be possible to use to glean further
information here...

This could only really happen if the multimedia view was being at least
initiated (if not displayed) for those folders. Obviously, you should be able
to get rid of this error by turning off the Web View and switching back to
Classic View for your folders. Alternatively and not recommended, you can run
"regsvr32 c:\windows\system\msdxm.ocx", which will put WMP6 (not WMP9) back in
charge of shell folder multimedia preview. You can run "regsvr32
c:\windows\system\wmpdxm.dll" to undo that."
--
Mike Maltby MS-MVP



Brian Chamberlain wrote:

When I try to open a desktop folder by left clicking on it
I get the following message:
Explorer caused an error in WMP DXM.DLL. i click on OK and
it takes me back to the desktop but now some of my taskbar
icons have disappeared.
I can open the folders by right clicking on them and then
selecting "Explorer" but obviously something has gone
wrong with my system. Help