what router do you have ??
i had the same problem once with my new QboxHD
i went into my router , local netwok, delited the assigned local ip from the local network, power off and on the qboxhd it gave me new ip.
Also i have had a diferent IP then what router assigned me, router says to me that my ip is 106 at the end , but i have it 115 as i have changed it. when i have the same problem as you , i siply try the ip that router had given me and it worked.