If you have not got it going yet I would be happy to help you direct. Give me an email if you want some direct help. Are you for sure your soundcard did not go south on you? Did you double check all connections again just to make sure you are hooked up OK? Did you check the volume settings on the PC? Is your radio relays kicking in when in the TX mode on psk31 or not?
Would be glad to help and I think we could get you going or find what is wrong.
73 de kb9umt Donkb9umt@arrl.net