Selectric trouble

I just picked up an IBM Correcting Selectric III, but now I've run into a little problem. The guy said he had it cleaned/checked out just before he stopped using it 10 years ago, but of course a lot can happen over 10 years in storage. I rolled in a piece of paper to give it a test, worked great, but after a couple paragraphs it has hit a problem. Basically, the ribbon/ball head seems to no longer do newlines properly. It will advance the paper but not return the head to the left margin. If I try typing anything after hitting Return, the keys are in the stiff state, like when the machine is off. If I Backspace all the way back to the left margin, the keys seem to unlock, until I hit Return again. Any Selectric Grand Masters around that can help me figure out what's gone wrong? The machine seems to be in really great shape, EXCEPT for this problem. Thanks John -- Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn