Cam install problem

I have just started my engine assembly and I allready hit a problem. My cam is stuck! It went in nice and easy till the last part when the front and rear get slid into there bearings. It jammed up so tight I could not pull it out. To make matters worse since I could not pull it out nor push it in, I took the rubber mallet and tapped it in all the way. Its binded so bad you can't even rotate it. Anyone have any suggestions how to get it out? I dunno if the cam bearings were in corectly installed or if COMP CAMS ground the cam wrong.