i am using sonar x1 producer..i use it to cover songs.the problem is with the midi file...after i export a guitar pro file as a midi file..i insert the file in sonar and delete every midi track except the drums one.then i record the guitar on it using zoom g series driver.i can hear the drums clearly when recording and playing it in sonar.but after exporting it as a wave or mp3 file.the drums just dissapear..even when i insert session drummer and use the midi with it.it still fails to playback the drums part.i know that midi is a musical data.plus the wave file which i export does not sound like it does in sonar((the guitar part)).it sounds bad...bass gets higher.it does not allow me to set the sample rate higher than 16..please help

Please, give us your system specs tell clearly what and how you're doing.
What are you using for drum synth when not Session Drummer? What are your exact export settings and how do you select what to export? Does the G2 work also as a soundcard, or are you using something else for soundcard? What driver mode are you using?
 
After export bass gets higher? Or do you mean louder?? A sample rate mismatch may cause changes in pitch (soundcard and SONAR are using different sample rate) The info you give is not enough to know what actually is happening or make any guesses about what could be wrong. That 16 you mention is not a sample rate but bit depth. Sample rates are like 44,1 kHz, 48 kHz etc.

Do you know how to use soft synths in general (if you can't get Session Drummer to work)? How exactly are you inserting it?