Did you copy and paste the text into something and then tell it to print? Which program did you use to produce the print job?
If it was Word or some other word processing program, try this.
Open Notepad. There should be an icon for it on your Desktop, if not you'll probably find it in your Start programs menu under Accessories.
Once open, do the same thing. Copy and paste the text into Notepad and then click File and Print. When you do that I want you to check two things. First of all, the Print window will tell you the name of the printer it is going to send the print job to. Confirm that it is describing the correct printer name and model. After the print job completes printing, compare the two, the one from Notepad and the one produced by the other program. Let me know if they are the same font styles and same font sizes.