XBOX 360 cant connect to wireless router, but laptop is at full strength? Help!?

Ok so I just got an XBOX 360 wireless adapter to connect to my wireless router in my house. Now the XBOX says that the MTU settings are low and it needs at least 1360 but I logged in to the router and it says that the MTU is at 1454! And whats really weird is that my laptop connection is at full strength. What is the problem?