That exclamation mark means that the printer has an error.
Check your margins in AppleWorks. If you have a line of type all the way to the bottom of the page, it will not print. If you have type at the very top of the page, it will not print. If you are out of paper or ink, it will not print.
Click on the print center icon that has the exclamation mark and the queue will come up. In most cases, you will be told what the problem is.