viagra?

Hi All,
I'm having a small problem with my disco td5 - everything locks/unlocks as it should with the push-button fob until yesterday. It seems the driver's side rear door has just gone offline and refuses to unlock - when I clamber inside it unlocks happily with the door handle and still locks on the fob, but from outside I can hear the mechanism trying to push the button up but it fails to shift it. I phoned my landy-enthusiast friend who said it was a common problem and suggested I give the button a dose of viagra!

Any suggestions on how to free up the mechanism without going down the performance-enhancing route?

Thanks Robin

It is a common issue, therefore all the info u need has already been posted in this and other disco Forums.
U will find in your search that the bottom line is that the lock is faulty so a replacement is required.