scope sighting is off

OK guys here's one I can't figure out. My scope is shooting at about 7 o'clock 3 inches from bull ( at 20 yards) and my elevation is all the way up. How can I get back to a normal adjustment. I had this rifle dead zero before. I moved the adjustments about 40 clicks and have no more room to go up. It hasn't been banged or anything. I really don't know what to do. Any help would be greatly appreciated
 
Thank you all. I ended up removing the scope and mounts like suggested. I realized that the mounts were adjustable elevation mounts and recentered the scope adjusted the front mount up one notch, It took a while but I did it. I was ready to throw the whole scope and mounts out the f^&*ing window but with a lot of patience I got it done. I sorry I did not give enough information But all your suggestions helped.

Thank you Thank you Thank you.
I was just wondering how you were doing,
sounds like you are doing very well,,,
bitten by 'adjustable',,, and healed