This all started a couple of weeks ago Car goes into TRANS FAIL SAFE MODE loses power and gearbox feels like it is about to drop out.

The car is only 3 months old (05 model) It went into the dealer and they said they did a software update and it was fine but on my way home tonight has gone wrong again :-(

Has anyone else had any simular problems?

Thanks in advance as this is really driving me crazy and this should not be happening on a car of this price and age!!