Windows 7 does not recognize M-Audio Mobile Pre USB microphone

[jacquesharting]

I'm trying to connect my good old M-Audio Mobile Pre USB to my new Windows 7 PC and I can't get it to work. This is what my issue looks like:
I have the M-Audio Mobile Pre USB connected to my USB-2 port
To the M-Audio Mobile Pre USB I have connected two microphones, requiring phantom power, so on the MobilePre box I have switched phantom power on
All looks fine on the box:
- all lights are on that should be on
- when I tap the mikes, the Signal indicators light, so I assume the mikes work well on the box - they always have.
On my PC:
- I have installed the latest Windows driver (1.1.8)
- When I go to --> Configuration Panel --> Hardware I see the MobilePre installed and working well
- PC rebooted several times

What does not work: I cannot select/see the USB microphones when I go to --> Sounds --> Recording device. I see other mikes, and I have tried them all, but none of them represent the mikes I connected through the MobilePre.
Also when I go to Audacity, only the four mikes I see under Sounds can be selected, but not the USB mikes.

What can I do to get this to work??? Thanks for your help!