Hi Sharon,
I've just had exactly the same problem with exactly the same flymo. I'm no sparky by a long chalk, so I asked my mate Steve, who is pretty handy, but is no sparky either - so make of this advice what you will!
Anyway, Steve said blue to blue and brown to brown. I wired it up tonight and gave it a go (neighbour watching, ready to phone ambulance) - worked a treat and I'm still here to type the tale, so I recommend colour matching!
alan, May 2008