Stereo antenna does not work

[portokatsiki]

had a go yesterday to try and fix the antenna on my s3 xr8. The antenna doesnt work at all whether the radio is turned on or off. Also when the radio is turned on or off the antenna motor doesnt work either.Pulled the antenna apart the mast is not broken and is not stuck either.I pulled the antenna up manually and it doesnt move from the position I leave it in.I worked out that when I leave the antenna up and reconnect the battery the antenna will only go down and stay there until I move it manually up again.Any ideas its got me scratching my head
thanks in advance