door lock problem.
 

Hi Guys.
I am hoping someone out there can help me with a problem I have with my 2004 Voyager (u.k.).
When I press the lock button on my key fob the alarm activates but the door locks do not engage.
I have temporarily cured this problem by disconnecting the battery for about 5 minutes and then reconnecting it.
This seems to reset the system, but, this is only a temporary measure not a cure as the problem returns after a while.
Thanks in advance.
Quietman