Since I know of no "WINDOWS" 2007, I'll guess that you mean you're running "OFFICE" 2007 on Windows XP operating system but please verify..
If that's the case, and you've checked the toolbar manufacturer's website, you should be able to determine whether it's supported on the newer version of Office. It appears like it's only supported on Office 2003.. Whether it works or not, maybe you can tell us..
Hope this helps.
I downloaded this toolbar from your site for Windows 2003, but I have upgraded it to Windows 2007. However, nowhere does it mention that it can be used for the latter system.
I primarily use this toolbar for Word and Outlook.
My system info are Windows XP Professional, Service Pack 3, MS Office Ultimate 2007, Dell Dimension 8200 computer.