while googling/binging this up (http://social.msdn.microsoft.com/Forums/en-US/sqlce/thread/fd60ba69-e4d6-441a-901f-947ac7a46d3c/
), I came to the idea that this could be caused with by mismatch between the managed and the unmanaged parts of the MS SqlClient. In OpenAccess, we are not using unmanaged code, all is MSIL. However, if a driver consists of parts in both worlds, a mismatch could lead to such effects.
Can you check that, and ensure also that the failing maching has all updates? Maybe you can see the version numbers of the assemblies too.
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