I am not clear what you are asking you say the speedtouch isnt picking up the network. The speedtouch gives out network ips or do you mean the router be seen by the pc and the light show no connection?
If the router is showing no connection then either the router is knackered the cable is knackered or the cable is the wrong type ie a cross over cable.
All you should need to do is turn the router on plug in a straight cable plug the other end into the pc. Make sure the pc is set to get its ip via dhcp automatically then open the browser with the address in the instruction and you should get a setup website.