Whether I use the key or remote to lock my car, the doors lock but then they all immediately unlock again. The only way to keep the power locks down is to just forcefully hold the drivers side lock down until it eventually gives up and switches the power locks off. I can manually lock passenger doors fine as they do not engage the central locking. What could be the problem?? I had my alarm checked over so its not the aftermarket alarm...

Could it be the Alternator? Power Locks Module? Drivers Side Door Lock? I need help!