tried mr2 forum but no help so..........

my mr2 has just started unlocking and locking itself really fast (as in lock unlock lock unlock etc owned it about 2 weeks now and never had this problem before, it had a clifford before which isnt active at the moment (thought it could have summin to do with the anti hijack they have but i dont have the fob! so dont think its that! any help grateful as its driving me nuts! cheers adam