The OLE DB provider now requires that you specify the database name as part of a four-part identifier.
SELECT * FROM LS153.iqdemo.DBA.emp1
SELECT * FROM LS152..DBA.emp1
Apply a recent EBF to update earlier versions of Sybase IQ with a more recent version of the provider.
See this topic in the SQL Anywhere documentation:
SQL Anywhere 11.0.1 > SQL Anywhere Server - Programming > SQL Anywhere Data Access APIs > SQL Anywhere OLE DB and ADO development