Can anyone help with a problem regarding the resync property in Access 2000 forms.

I have a project which is connected to a SQL Server 2000 back end. I have created some snapshot forms which need to be able to add and amend data in the tables. I have correcty set up the unique table identifyer (my first problem!) but although it appears to need some sort of SELECT statement for the resync property, I cant find any info from Access help to identify specifics...

Any advice or suggestions to where I can find help on this would be appreciated.