Your post is a good start but I can't tell if your router had the firewall turned on. WPA2 is supported, WPA2 Enterprise is not. It's rare to see the latter.
There are other reasons but as it stands the incomplete details mean I can't offer much other than the usual issue of the router firewall.
I can't seem to get my Canon MG5220 Wireless Printer to connect to my Belkin N150 wireless router. The printer sees the belkin wireless router network name but cannot connect to it( after entering the correct security key). It worked fine with a previous wireless router. My desktop PC is connected to the belkin router via direct ethernet, and I want to be able to access my wireless printer which is located in another room from my PC. I think I remember reading that the canon mg5220 may not support WPA2 security, but Its only a year old and would prefer not to regonfigure my router's security setting. Any ideas on how I can get this printer to connect to my router? Any other ways to access this printer from my PC which is connected to LAN via ethernet?