I am trying to use ORACLE 8i with ADO 2.0 I have established the connection on two nodes successfully but on other two node I am getting following error when I use ADO Data Control to create connection string and Test the Connection "Test connection failed because of an error in initializing provider. Error while trying to retrieve text for error ORA-00000". On these two problematic node I am able to communicate with ORACLE using SQL Plus Also suggest is there any way to uninstall and delete MDAC 2.0 so that it can be reload it. This problem has one solution that is format the hard disk and reload Windows 95, IE 4.01, DCON98, MDAC2.0. But I feel there should be another better way of resolving this problem.