Paper Jam Error

I can not send a fax, paper jam error. I don't believe there is a jam. Not sure if the rollers are turning. Is there a way to trouble shoot this problem? I have taken the roller out and cleaned and it looks like the wheels to the right in fact are turning the roller. I did do a copy using the color button. It all worked ok. But when in the fax setting the paper will not go through the roller. It thinks I have sent a fax, I received a print confirmation, when in fact the paper did not go through the rollers. I tried to take the cover off, but it would not come off after taking out all the screws I could see. I wanted to look inside to see if there was something causing the rollers not to turn. Just need to know what to look for or what to do. Thanks