problems connecting with XBL

I got my router working again yesterday and I tried to work the adapter for my 360, but it wont, I troubleshot the connection and it said the MTU failed, I don't know what that means, can any1 tell me whats wrong and how to fix it

 The status codes are

w: 0000-0015

X: 0000-F001

Y: 0000-0000

Z: 0000-0000

Check this out

http://www.xbox.com/en-US/support/connecttolive/xbox360/connectionmethods/troubleshootliveconnection-testmtu.htm 

If that doesn't help at the bottem it tells you to call Xbox Live.