407 electric window reset

[WiNgNuTz]

Got a thread up on peugeotforums, but they seem quite slow to reply, so figured it'd be worth a punt chucking a thread up on here too.

Basically, the drivers side rear window on the barge opens no problem, but when closing it reaches the top (closed position), but then comes back down a few inches, obviously thinking something is obstructing it shutting properly.

I've read there is a reset procedure (ignition on - window fully down - window fully up - continue holding switch for 2 seconds - ignition off), but every time the window reaches the closed position, it automatically lowers again, even if I hold the switch. Any pointers?

It's a long shot, I know, but figured it's worth a punt.