My NAT type is on moderate so I cant pla...

your xbox should of had a disk with it to run your network settings and store them on a memmory card the properties as long as you have your network setup disk save the properties to memmory car of xbox and then you shouldnt have no more problems
but if you need to proceed further you need to set router settings manually
in internet explorer search bar type in this code here 192.168.0.1 this is your fixed router ip this will bring up the screen for router protocol
it will ask for name and password unless you changed the password and name it should still be normal
type=admin for name
type=password for password this will give info on your routers and specs

I tried everything and eventually figured this out.  Do this!

Enable DHCP set the start ip to 192.168.1.100, and remove any static IP address on your xbox 360 (have it automatically detect connections)
Set the MTU to 1364.
enable UPnP.
if you are using wrt-dd (if you aren't, you should be)  setup QoS so xboxlive has premium priority.

And you have hit the ground running.  Even microshats own website wont' help you fix this stupid problem.

I promiss this will work ;)

Thank your,richard_virg,your suggestion does work!