Help needed!

I have an automatic disco '03 reg that is stuck in 1st gear - won't go above 3000 revs! How do I sort this out? Please help!
Thanks

Update!! Had comp. plugged in no fault codes. Mech. took it for a drive and reckons it is stuck in a gear. On idle it sounds like a tractor( no **** takes)

Sorry Mastiff, I can't help but you could try posting in the Disco section to see if anyone else can.

You've already got a thread for this, so don't start new threads in a different place. Post a reply on the original thread so the people trying to help you over there know where they are and don't ask more, different questions which you haven't answered yet!

Is there any oil in it?

Does the oil need topping up or changing?

Does the selector move back and forth easily?