Try to see first the print preview and its options, I mean scale, b/w print and so on... Near print scale there is an icon called CENTER TO PAGE!!!
Or maybe you have already set this stuff an you can find out that paper size is wrong, so try to check it!
look this image:
If it is a problem of the printer itself (I hope for you that is not the case), try to print in PDF, if you are under windows I use "doPDF" printer, so I can set the paper size, the PDF dpi and some other stuff...
I print in pdf many times because of my "job", and I never had problems, if you are under linux then it should be some postscript option when you print, if you are using a Mac try to find a PDF printer even in this situation, I never used a Mac, sorry.
I hope that I could help you... See ya friend!
...the problem is not the problem, the problem is your aptitude about the problem...