LOUSY SOUND

HELP!!!
New to FS2002 and this is probably simple to experienced users. All my voices (ATC, Rod Machado, ATIS, etc) sound like they are speaking into a paint can-very echo-ey about 95 % unintelligible. I have a good sound card and have tried every possible setting that I could think of. This is the only program on my computer that does this. Any ideas?????
Thanks in advance!!
New to FS2002 and this is probably simple to experienced users. All my voices (ATC, Rod Machado, ATIS, etc) sound like they are speaking into a paint can-very echo-ey about 95 % unintelligible. I have a good sound card and have tried every possible setting that I could think of. This is the only program on my computer that does this. Any ideas?????
Thanks in advance!!