Totally not working radio on mk2

[maxp]

I installed a head unit yesterday and the radio isnt working one bit (cant pick up anything!).

I have no idea if it worked before, so my questions are;
Is there anything i could possibly of done wrong wiring the head unit?
Did mk2's come with a radio booster of any sorts?
Were there any common 'weak' points in the system that i should check first?

Thanks

[Mr Blue]

did you connect the radio wire?

Ive earthed my radio wire and get full reception. Dont know if this is doing any harm but sod it...its working