If I remember properly, your My Places bar was customised with an added place, called Business. I can't confirm as your screen print has gone from that web site.
How did you add that to your My places bar? If you used software, may be the software has caused this problem.
So, what I would try now. Remove that customised place. Reboot, (restart), the computer, and see if the My Places bar now works properly.
If that still doesn't solve the problem, then you need to dive into the registry and see what keys and values are there.
Depending which Office suite you are using, the registry reference will be in;
HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Common\Open Find\Places
eg 10.0 for Office XP, (2002), 11.0 for Office 2003, or 12.0 for Office 2007.
Check the Places keys and values there, and ensure that they conform to what they should be. The relevant keys and values are outlined in the Microsoft support page I gave earlier, at;
http://support.microsoft.com/kb/826214
Scroll down to the section titled, "How to edit the registry to hide desktop items". The title is misleading perhaps, but the details are there.
Beware! Making changes to the registry can halt the machine dead if you make errors. Make sure you know how to backup the registry, and how to recover from an error if the system fails.
Mark