My printer an HP Officejet Pro K5400 keeps saying it's out of paper. It won't print any of my documents. It's not out of paper and it will print all of HP's stupied BS pages and test pages but not my docs. Even though it pulls a sheet of paper through it to print out the HP pages it's says it's out of paper and won't print. I can't get through to HP tech supt. live chat and they want me to pay for phone tech supt. It's their product and it's a BS error and they won't fix it. Can anyone tell me how to fix this problem? I have tried reseting it, unplugging it nothging is working.