Can't connect zoom H6 as audio interface in Reason

[samr4560]

Hi everyone!

First off I hope I'm posting this in the right place, I'm new to the forums.

I was just wondering if you might be able to help me sort out a problem. I have a zoom H6 that I use for field recordings all the time- however it also can be used as a 2-in/2-out or 6-in/-2-out interface. (I've downloaded the drivers already).
Recently I tried to use it to record into Reason however and I can't seem to get it working. I go into edit>preferences>audio and select "ASIO Zoom and F series multi ASIO" from the audio card driver menu but when I do a red X appears next to the menu and I'm not able to adjust any settings. When I turn on the Zoom I can't record and get feedback or occasional noises from the built in speaker. As soon as I unplug it from the computer it works normally again as a portable recorder. Just wondering if anyone can help me resolve this? I'm not sure what I'm doing wrong...

Thanks very much,

Sam.