Well, I'm afraid I'm not much help at this stage. I've not worked with "proxy tables" at all either in Access or SQL Server - from web research they appear to used primarily with SyBase rather than SQL Server. But the fact that you are able to get to work on some PCs but not on others suggests to me that either the network connection to one or more of the PCs is flakey, or that you have software differences in what used to be called the MDAC package. Are all workstations running the same OS, and do they all have SP3 for Office 2007?