206 gti not starting

[anonymous-user]

hi my mums 206 gti is not starting. I thought it was the battery so charged it over night and went to start but it basically makes a clicking noise. I checked the battery, holding charge and fully charged.
My only thought is the immobiliser is stopping it starting. So I disconnecting it and leave it 24 hours.

Any other ideas.

[anonymous-user]

changed the battery and was fine for 2 days then died. i think it is the starter nut will get the aa to check.