Cabriolet Power roof not Working / Electric aerial extended -stops roof from lowering

[Q7quattro]

I have a 1993 cabrio , power roof will not lower.


The electric aerial is fully extended and will not lower ,

will this prevent the roof from lowering ?

here is what happens so far

1) engine running

2) turn "T" bar to unlock roof

3) all 4 windows lower

4) lift the switch to lower the roof and ROOF LIGHT FLASHES IN DASHBOARD - and that's it


(checked all fuses , and hydraulic fluid in boot for roof - all ok)

Thanks in advance .