CatastrophicFailure Error

Hi ,

When I am Executing C# webapplication ,
I am getting Error Like Below

Database Error --> Catastrophic failure
stack Trace: at
System.Data.OleDb.OleDbConnection.ProcessResults(Int32 hr) at System.Data.OleDb.OleDbConnection.CreateProviderError(Int32 hr) at System.Data.OleDb.OleDbConnection.CreateProvider(OleDbConnectionString constr) at System.Data.OleDb.OleDbConnection.Open() at Purchaseorder.frmLogin.btnSignIn_Click(Object sender, EventArgs e) in
c:\inetpub\wwwroot\pott\login.aspx.cs:line 63

In login page when User Clicks on SignIn Button The Click Event Code is as follows:

Code:

OleDbConnection con=new OleDbConnection("provider=msdaora.1;user id=something;password=something;Data source=something "); private void btnSignIn_Click(object sender, System.EventArgs e) { try { Str=//something OleDbCommand cmd=new OleDbCommand(str,con); OleDbDataReader dr; con.Open(); //This is the Line 63 dr=cmd.ExecuteReader(); //some code here con.Close(); dr.Close(); con.Dispose(); } catch(Exception ex) { lblmsg.Text="Database Error --> " +ex.Message+"stack Trace:" +ex.StackTrace; } }

Contacting Database: Oracle
Provider : msdaora.1

I have gone through the Microsoft website and find a solution regarding Security Setting Like assigning “Impersonate a client after authentication” permission to IWAM user. I have granted But Still Getting the Same Catastrophic Failure Error.

What may be the Reason?.

Thanks in advance