is it all totally wired in appart from the live?

disconnect the battery earth, then wire in the perm live and connect up the earth again. it shouldnt arm straight away but make sure the door is open but the switch is depressed and keyfob is safely in your hand just in case

there should be a small button in the loom for it hidden somewhere, find this button, if it goes off again when connect up the live then put the ignition on, with the ignition on hold this button down, should disarm the alarm after about 3 seconds.

if that disarms it then try arming it again with the fob. chances are the fobs fooked or something...