Win 7 switching between host and guest in seamless mode

[mcfip]

When I am in my Win 7 guest, I must click on the host's desktop before I can get control to the "panels" of the host.

Example:
Host has Firefox and Virtualbox running
Guest has Notepad running

I can click between the notepad and firefox applications without issue. This is normal.
When in Firefox, I can click on any object in the gnome panels to go to that object/application. This is normal.

When in notepad, I cannot click on the any object in the gnome panels and switch to that object. I must first click in an open gnome window or on the desktop, then I can click on a panel object.

I would think this is a host control setting, but cannot see anything logical.

Any thoughts/suggestions?
Thanks,
Mike

[mcfip]

Sorry, I forgot to paste system info.


CentOS: 6.3 (Final)
Linux kernal: CentOS: 2.6.32-279.2.1.el6.x86_64
Virtualbox: 4.1.18 r78361
Virtualbox extensions loaded/installed.
Installed guest additions

Mike