Thanks again for your quick response.
It actually says forms[0].
I am using VT 2.3.5.
When I change all occurrences of forms[0] to the form name (reg2010) everything appears to work fine.
I'll take a look at Form Builder; however from your perpsective, as a short term workaround, should this work OK? Can you think of any problems this could cause?
Thanks again for your support.