2003 Discovery rear "jacked up"

Hello to all, this is my first post. We have a 2003 Discovery. Yesterday, after my wife parked the vehicle, for some inexplicable reason the right rear suspension appears to be fully extended. I have tried simply driving to reset the ride height and using the ride height adjusting button to no avail. The truck's road manners appear to be intact and there are no warning lamps lit. Any thoughts or suggestions would be greatly appreciated! Thanks, Dave.

just the right rear ?

thanks for the reply. yes, just the right rear.
-Dave

erm, thats got me stumped, must be something seriously wrong if it is raising the right rear by its self, maybe the onboard computer is damgaed or faulty? this one has got me seriosly stumped, sorry i cant help but let me know if you find out whats causing it, thanks