Hi
That kind of problems I have not had. If I remember correctly the Nokia E90 worked fine with my BMW E90 (2005) Professional Radio (no iDrive but with voice command).

Today I have X3 2009 and both Nokia E90, E72 and N8 works well (no iDrive no voice command) with the Professional Radio. Interesting to see if it works in F25 which I will get tomorrow...

Please try to find the above link from Symbian Developer Network Forums - and try accordingly. I hope it helps and solves your problems.