Firefox Portable inside Virtual PC 2007

Hello there,

at work I use a virtual machine loaded inside virtual PC 2007 most of the time.

Since I don't want to install a lot of application in it, I tought to map a directory inside the virtual machine to the usb key containing Portable Apps plugged in the host system.

The platform loads smoothly, because the menu is as it should be and it even changes my wallpaper. I am also able to run and use Pidgin.

Firefox however load and run but extensions and bookmarks are all disabled. Even the address bar is not working.

Any hints on how to avoid this behaviour?

Thanks