iPhone HotSpot and Toshiba Bluetooth

I have checked the posts and don't see anything that gets to the root of my issue. Here goes:

I have a Toshiba Tecra R10 laptop with Win 7 Ultimate. For Bluetooth it has the most current Toshiba Bluetooth Stack. I can get my iPhone paired with the laptop, and can initially get the iPhone Personal Hot Spot working, but it will always eventually disconnect, usually after 30 seconds or so of web browsing. It may bring up a page or two, but eventually drops the connection. The iPhone Personal Hot Spot works fine with a Dell Netbook I have and my HP laptop. So the issues is with the Toshiba.

I spent time with Apple Support and Toshiba Support. I restored the iPhone per Apple (btw, it has the latest Apple IOS 4.3.2 for iPhone), and reloaded the BT Stack and downloaded the latest BIOS per Toshiba. Nothing helps.

I want to fix this!