haxorware ambit 250 speed issues and conection problem

[jony5salive]

hi if anyone can help me id be sooooooo grateful, i had my ambit 250 going for a long time on the same mac and was spot on gettin 20 meg. now it only gets 10 and is a bad connection. i have tried loads of macs , configs, serversand nothing is working. i know the mac is good as i tried the same mac on a friends modem at mine and was gettin 20 meg and a decent connection. its proper blaggin my head so if anyone can help id realy apreciate it
cheers
jon