When the SAOLEDB provider is installed using the SQL Anywhere installer, the provider registers itself. This registration process includes making registry entries in the COM section of the registry, so that ADO can locate the DLL when the SAOLEDB provider is called. If you change the location of your DLL, you must re-register it.

 Example

regsvr32 dboledb16.dll
regsvr32 dboledba16.dll