Hi Joan, It could be down to the location of the clock, for example if there are high building around or the clock is near a computer or a metal framed building this could stop the clock recieving the radio signal and just be working as an normal Quartz clock. The best way to find out if this is the problem is to move the location of the clock for 24hrs and see if this has any effect on the time. Hope this helps, let me know if you are still having problems
Stuart Essex, November 2009