HP Deskjet F300 All in One Printer has an error

While I was in a middle of printing 30 pages of documents, my printer suddenly stops printing and there is no error showing on the screen. This printer has a built in scanner and copier.
After clicking the print tab on Microsoft word 2007, I can see the printer icon in my system tray at the bottom of my desktop, if I click the icon, the printer box will open showing me the status of what I am printing, like if it's already printing or Canceled.
I waited for about one minute to make it work, but the icon stays in my system tray, and the status field is blank.
So what I did is to push the Off button on my HP Printer and cancelled the document I am printing. Then restart my computer and repeat the same steps, At first, the document will print then stops. If I hit the print tab in ms-word, it will add to my system tray. And the status is blank, no matter how many times I hit the print tab.
I am using HP Deskjet Printer All in One (It has a printer with a combination of scanner and copier).
My Operating System is Windows Vista Service Pack 2
I tried printing large volumes of documents before and I never had any problems.
What is the possible cause of this?
Did I accidentally change something on my printer setup?
Please let me know.
