Annoying Central Locking

When i locked my 4.6 with the key the other night, all was fine. Went to it the next morning and had to use the emergency access code. After unlocking with the code, and locking again with the key, the remote worked.

Unfortunately, it seems to do it when left standing every night now

Was out last night at about 10, went to it this evening, and she had locked me out again. The light on the button works fine, but its just like the car isn't "talking" to the plip.

Any help much appreciated.
Regards
David Hallworth.

have u searched these forums?, im sure there are a few threads on this subject. here is one: http://www.landyzone.co.uk/lz/showthread.php?t=24069&highlight=locked+out

but im sure there are more...