I own a wide format (A3+) HP Officejet 7110. I try to printi in A3 but it is not possible. I have made several tries, even from Autocad Software of MS Office Word Software but always it comes up to printing everything in A4. Although I have A3 paper the printing area shrinks to A4 and prints in that size. My operating system is Windows 7 - Ultimate. What am i doing wrong?