Ericsson F3507g Mobile Broadband card Driver for X301

[u751920]

Hi All,
Cannot seem to get this card to operate correctly. If there is anybody using this card in their x301 can they point me to the driver they are using.
I can connect to the net for about 30secs then it disconnects saying no signal strength. Windows is saying I have the wrong driver for the version of windows I'm using but I got this off the Lenovo site.

Details:
Driver Provider - Ericsson
Driver Date - 29/07/2009
Driver Version - 1.0.0.52

The sim card works correctly as I've checked it else where.
Thanks