Problem with trigger using spotter source

I have been using spotter CQ Zone 14 to narrow my source of spots. I wanted to narrow this further so I tried using spotter prefix. Eg G,GW,GI,GM,ON,PA When doing this I don’t receive any spots, if I revert to Zone 14 they start coming through again. What am I doing wrong?

Use a “Spotter DXCC” condition instead of “Spotter prefix”.

Thanks. I didn’t really follow the instruction underneath, but do now.