Due Punto Zero Signature problem

[scruffy_bear]

Hey I try to change the signature size with this

http://notepad.patheticcockroach.com/370...e-in-mybb/

but it's busted the site and turn all the links blue and broke the site in google chome . Now my host is doing a back up which will fix this but why does this happen and is there a easyer way to change the signature size

my site http://www.soapboxgamers.co.uk