I don't know if this will help, but you may want to give it a try.
1) Plug the iPod into the PC
2) On the PC, click Start and go to Devices and Printers
3) If the PC is recognizing the iPod at all, it should show up under Devices (probably called iPod USB Device)
4) Right Click on the iPod USB Device and select Troubleshoot
5) Follow the prompts from the Windows 7 Device troubleshooter (note: the troubleshooter may not detect a problem even if one exists, also it may not be able to figure out a fix even if it detects a problem).
If this does not work, I suggest the following:
1) Plug the iPod into the PC
2) Go to Control Panel-->Hardware and Sound-->Device Manager
3) In Device Manager, expand the tree that says Universal Bus Controllers
4) You may see Apple Mobile Device USB Driver - usually if there is a problem the driver will be highlighted (I forget the exact way, maybe a ?). You can right click on the Driver and take different actions (I would try Update Driver Software - if that does not work I would Uninstall and scan for hardware changes)
If Windows is not identifying the iPod at all you may see an Unkown Device under Device Manager - this is probably highlighted as a problem. I would right click on it and try to Update Driver Software - if that does not work I would Uninstall it and scan for hardware changes.
Once you get the iPod Driver problems sorted out, MC should work just fine.
Good luck...