We first have to determine if the problem is inside or outside Qimage. If the processing bar in Qimage goes all the way to 100%, then the problem is likely not in Qimage but in the driver or Windows spooler. 17400 x 6600 should be a 344 MB file. If it's 658 MB, that means it probably has alpha channels or layers. You might want to flatten the file.
If Qimage is spooling to 100% and finishing, these articles contain all the info available on troubleshooting system problems when it comes to printing:
http://ddisoftware.com/tech/articles/april-2006-houston-we-have-a-(printing)-problem/http://ddisoftware.com/tech/articles/february-2006-wide-load-tips-for-printing-large/Mike