Hi Jim,

1st problem - don't know where you get the notion that SB4 is the only approved client for FSX! Try FSInn and FSCopilot, but, make sure you have the correct versions for FSX. I use it and have never had a problem.

As I don't use SB4 then I can't comment further in that I personally would uninstall SB4. Find the link to FSInn from VATSIM's web site and install that.

Also, when you use either SB4 or FSInn ensure that the sound card/device you use do not mismatch! i.e. The aircraft sounds and SB$ or FSInn CANNOT use Wave or Direct sound together! Set it up that the sim uses Wave Sound and SB4 or FSInn uses Direct Sound.

Check before uninstalling SB4 that the above is not the case, change one and then try. If you still have the issues then uninstall SB4 and try FSInn.

Hope this helps you.

Regards,

James.