having a little trouble

[frequency]

ok guys i dont know what i am doing wrong but heres the delema. i connected the swtich to my router using rj45 cable and i connected my computer and xbox to the switch using a rj45 cable each. when i go to the settings on the xbox it says static=yes and ip address is 192.168.0.157. so i fire up flashxp and put in the address and xbox for the username and password as well and i cant seem to connect. i dont know why i cant connect to the xbox and i know its connected with a rj45 cable cause thats what it said when i bought the cables. its something really minor but i cant seem to figure it out.