Just got my Crest prolite 2.0 and it has these xlr 1/4 combination input jacks. I put a 1/4 into the jack and now I cannot get it out. No doubt there is some trick to release the plug. I tried push and twist etc and no matter how much I muck around it will not release. There is no release lever (etc) that I can see. Please share how to release the plug.