I keep getting paper jams when I print from my 3000cn printer. A page prints followed by one or two other papers attached/stacked behind it. It then states check paper size some times and others just tells me that there is a jam. I press the arrow button to cancel and clear the extra papers from the top. It then prints decent at times for 1 - 4 papers. Then it has the additional papers stacked with the other ...feeding problem. There are no other issues with my printer. Is this a drum problem? Do I need a new drum cartridge? is it a roller problem? If so which ones and how do I fix this?