Printing Help

I created a vector graphic in Illustrator that is 1000 x 700mm and imported it into quark to print. Due to the limits of our printer we can only print one half of the document at a time. So I have only part of the document masked in quark. The issue I am running into is that that when the doc is printing out, it prints out rough... very similar to the preview in quark. We have alreay printed other files in the same way but they were smaller and printed clean.

Does anyone know any weird issues that I might be overlooking? Tried replacing the print drivers and when we import one of the earlier graphics that printed fine in the quark doc it prints clean. Tried rasterizing the file and tried printing from another work station. I work from a G5 and the printer is a Canon ImagePROGRAF W6400. If this has happened to anyone else and they know a way around it, let me know please.

Thanks,
John