Printing return address labels

I am not able to print return address labels. I am using Microsoft suite
2003, Microsoft task. It has a program for printing the labels. My
printer(Lexmark X125) goes through all the motions of printing the labels but
does not lay down any ink. The printer works properly in all other respects.
They told me it sounded like a software problem and that I should contact
you. This is the firs time I've tried to print return address labels and I
may have input somthing wrong, but cannot discover what it is. Can you
suggest something to me. The printer sounds like it is printing labels but
does not lay down any ink.