Help! 300tdi windows wont open....sometimes

Hi
All the electric windows on my 300tdi have decided they dont want to work at the moment, they did it it a while ago, then started working again. Then stopped, so i did the ecu resoldering thing (is that just the rear windows anyway?) and they worked for a while again, now nothing.
Any ideas would be greatly appreciated
Thanks

Have you checked all the usual gremlins, fuses, switches and lastly motors ?

If yes, it may be a case of damp has done for your unit again !!!