Have had SharePort working continuously since May, 2009 (Canon MF4350d). However, the problem that is driving me crazy is the speed. The printer starts to warm up, then stops briefly and then prints the first page. This process is repeated for every page. Instead of the normal process of warm-up followed by page after page printed according to the printer's speed limitations there seems to be a problem in the data transfer via SharePort to the the printer. Why is this so slow and is there a fix for it? I would hate to print a long document with this setup. It would take days. Please help!