When the SAOLEDB provider is installed using the SAP Sybase IQ 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.
The following commands register the SAP Sybase IQ OLE DB provider when run from the directory where the provider is installed:
regsvr32 dboledb16.dll regsvr32 dboledba16.dll