Huawei E156g Mobile Modem Freezes

Huawei e156g Mobile Broadband USB Stick

HP Pavilion dv7 2070ea

Windows 7 Professional 64bit

The laptop came preinstalled with Vista Home 64bit and i was able to use the mobile broadband without any issues.

I have installed Windows 7 Pro 64 in a dual boot config and it runs fine on wired or wireless connections, but when i try to use the mobile broadband i run into issues.

After the modem driver and software install and a few restarts I was able to get all the devices in the device manager to be happy, and i was able to connect via the 3 Connect software and access the internet. But after a few minutes Windows will inevitably lock up, regardless of what program is being used. The screen will freeze, there will be zero harddrive activity and the only course of action is to hold down the power button

The mobile broadbands company site says that the vista drivers should be happy on windows 7, but something isnt happy.

I really need to resolve this as my mobile broadband allows me to connect to various servers for work via its allowed IP address.

Is this the modem, the USB bus or something else?

I have checked the event log and there isnt anything useful in there.