Open Connection using OLEDB

I am getting a strange error when opening a connection using c#. Here is the exception i am getting. System.Data.Oledb.Oledbexceptoion: No Error information available: 0x8007007E. at System.Data.Oledb.oledbconnection.ProcessResult32(int32hr)..... Here is the code i am using. oleDbConnectionObject.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=abc.MDB"; if(oleDbConnectionObject.State == 0) { oleDbConnectionObject.Open(); } The above routine fails while opening a connection. I think this has to do with some of the dll's but not sure which one. any help is appreciated... Rajesh.