The wood will not feed on its own.

Question

Both the feed rolls are working the way they should but no matter how lightly I adjust the cutters, it will not feed thru. Even trying to assist the piece thru with some light pressure doesn't help. I have cleaned the tables ( nothing there anyway) thinking that there may have been something holding the wood from sliding. The only thing I can come up with is that it may be too cold ( about 20f) in my garage for the rolls to grab the wood. Any suggestions would be appreciated.