Firstly, I'm not sure to what "headers" you're referring. Do I conclude that you're trying to print e-mail messages, which routinely include "headers"?
I never heard of a printer printing the images but not the text. I have heard of the opposite, though, since text is trivial to print whereas images are a bigger deal, computationally speaking.
What software are you working with? What are the things you are printing that include headers, text, and images? How are you going about trying to print it?