Running RB 2012 updated.
I have a Midi track which plays fine in RB but when I render it to a WAV file there is no sound from that file.

The Midi (Standard Drum Kit) Track will only play with sound if Microsoft Wavetable Synth is selected.
All other synth options when selected give no sound.

When I try to render track to WAV it brings up a box which only has Coyote Forte(Default) and a list of DXi/VSTi Synths but no MS GS Wavetable to select.

MS GS Wavetable is at the top of my MIDI OUT list in Preferences/Midi Devices
Reroute to Default Synth box is not checked and Coyote Forte is in the Default Synth box

I guess I could play it as a Midi and try to record it with a mic on another computer and then import the WAV file but know there should be a simple way that works if I can figure out what I'm doing wrong.

This whole Midi thing can be verrry frustrating but will keep trying to learn it.

Counting flowers on the wall, it don't bother me at all....

Carkins