Have a look at the reference checker in the free products section of
www.codematic.net.
run this on the different machines to see if the version of DAO is
slightly different (different build number - should give a different
guid) if so the tool will point it out.
Also try looking at the properties of the actual dll that DAO 3.51 is
pointing at on the different machines.
Are they all patched to the same level?
Same (exact) version of Internet Explorer?
rest assured this sort of thing is a common problem when client PCs are
not totally identical.
Post back if none of this helped

cheers
Simon


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Simon Murphy
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