Can hear myself but not anyone else in a session

[StuartR]

Hi everyone, quick question. I have 1st port to my guitar. 2nd port to my drum machine. I am using ID14. I can hear myself and the drum machine. I can't hear anyone else in any session. 

It was working fine until I added the drum machine to port 2. It's not the mute or volume level. I have the UPnP enabled on the router.

Guess this will not work for me until I get someone to help. Frustrating the lack of support, I'd rather pay for a program that works and has support than have a "free program" that I cannot use. ugh

Does anyone know the answer?

Need more details...MAC or PC?

If you're using a PC what tuning steps did you perform on the OS to equip it to handle realtime audio?