I need to find out if it's my runtime application that interferes with a test site's,own networked Access or what.

Could this be a clue: I also installed an MS update of, MS
"mdac_typ.exe 2.8" on a Windows 98SE machine that is part of a network; Without it, I couldn't get my packaged software work. However, I did no installs on whatever server they are using.

Microsoft says, "IMPORTANT NOTE: The following version of the Microsoft Data Access Components (MDAC 2.8) are not supported on SQL Server 7.0 or 6.5 clustered installations. Please do NOT install this release of MDAC on such servers; doing so will break your cluster."

Again, the machine I had it installed on was a Windows98SE only that was a part of a network. I do not know what kind of server they use, or on what kind of server is typically used fow Windows 98SE.

John