Printing to Canon MDF from Mac Air will not print

We currently have two subnets 10.10.5.0/24 (WIFI) and 10.10.1.0/24 which is our data network, The fortnet has both network connected, Data network goes out WAN1 and the WIFI network to Internet has it own Router. The Both network are connected to the fortinet switch, both networks can ping, traceroute all seems fine, however trying to print from a MAC air to the printer fails, the Mac states the printer is connected, but when you print, it states printing, after around 5-10seconds goto into pause mode. Mac Air still status the printer is working and online.. On the Same MAC Air boot up with Win 7 and use the printer and it works.. Under Apple OS it will not print.. Connect the MAC air directly to the same subnet and it will print. The only clues in the fortinet logs is TCP 545 Block and TCP 9100 timeout. NO other messages in the log from the MAC Air.. The Policy allows all WIFI traffic to a selected few Canon MDF devices. Any one has any idea. No policys are blocking ports, and the  port 545 refers to policy 2 which is the policy which allows all services through..

Any idea's would be greatly appreciated.