The 750 works much better with WM6 on it. Also, if you are still running WM5, the paid version of jetwaremobile seems to do the trick. I tried it with the free trial version with no luck. However, after reading about some members on the e60.net forums talking about how they bought it and it worked I took the plunge. Do the trick.

Too bad I gave the 750 to my wife in lieu of my iPhone. Works well with my 5er iDrive. For what its worth...