How about regular PC sound, not Sonar?  Do you hear anything there?   Many PC sound chips have Sound Enhancements and if that is enabled it may be interfering???
 
I have RealTek and in the RealTek HD Manager, there is section for Sound Enhancements including echo, reverb, chorus, etc.
 
Looking at the Dell specs for your PC, it could have come with RealTek or it could have come with a SoundBlaster sound card.  I've had problems with a SoundBlaster sound card interfering with Sonar.  I had to finally remove the SoundBlaster card.
 

I always turn off all Win sound schemes to "no sound" in the Control Panel/Hardware and Sound......never had any issues after doing that.  
Not sure if your problem is coming directly from an alternate sound card as mentioned above or via Win Sound Scheme......either way, it's better to disable them and only use your audio card.

I don't know how but it was set to windows default. I'll check it when I do my practice routine. I use the FA 66 as my audio card. Looks like every thing else is disabled. Thanks for the help!!!