midi controller problem

I'm having a problem with my new M-audio Oxygen25 midi controller and GTP4. I run GTP4 on a Dell Inspiron 64-bit laptop running Windows 7.
My goal is to create acoustic bass tracks in GTP4 projects using the midi input.
My workflow goes:

1. insert midi track
2. set input as Oxygen25 Omni
3. set output as Microsoft GS wavetable synth
4. set patch as 'acoustic bass'

About half the time I get an acoustic bass sound - the other half I get a piano sound. The recording goes OK, though the latency is pretty bad regardless of the latency setting in Audio options.


Any advice? This is my first attempt to use midi functionality and I'm a bit frustrated. seems I have things set up wrong but for the moment I'm stuck.

Any help is much appreciated

Out of curiosity, why GS wavetable? Thats why you are getting different sounds, and thats what you use when you have nothing else, its horrible. That aside how are you hearing this, with outpit set to GS? Maybe try HD audio device(speakers), I am just confused about the output, and use of wavetable, isn't there Studio Instruments Bass that you could use for bass, thats what the controller is for, controlling softsynths, and other things as well. try inserting the Bass from SI, and use your 25 as input but change output, maybe, like I said I am confused. Good luck, try reading on how to use softsynths, stay away from the wavetable!