Octatrack Stereo out?

Hoping someone may be able to help me here. I got a feeling this may be a novice question and may be an issue with my soundcard.

Octatracks output is stereo yet I can only get a signal when my soundcard is switched to mono mode, is there something I’m missing here?

Thanks.

there’s not a lot to go on with your issue, but try to isolate the issue between OT & PC by testing the OT outs direct to mixer/spkrs etc or try another bit of kit into your PC to see what gear is not doing what you expected !

Thanks. Yea it’s fine if I just plug it directly to my monitors. I guess it’s an issue with my soundcard (it’s an external one btw, a Novation Nio)