6 month old IPF8400

I just bought my first large format printer. This is a second hand printer in really excellent condition. I bought it from an estate and it is about 6 months old. It prints beautifully from files that are already stored on the printers hard drive, but I can't get any of the files sent from my Mac to print. I go through all the settings on the mac and the computer acts like it's sent the file. Then it just disappears. I'm pretty sure it something I've forgot to do and not the machine. Any thoughts or suggestions?

 

Well ... I solved my problem. I'm not sure how I did but it's working.