ODP.NET

The code:

private Boolean getDBConnection()
{
//try
//{
//Connection Information
string connectionString =

//username
"User Id=" + ConnectionParams.Username +

//password
";Password=" + ConnectionParams.Password +

//replace with your datasource value (TNSnames)
";Data Source=" + ConnectionParams.Datasource;


//Connection to datasource, using connection parameters given above
conn = new OracleConnection(connectionString);


//Open database connection
conn.Open();
return true;
{

when run to conn.Open() the error:

---------------------------------------------------------------------------------------------

System.TypeInitializationException was unhandled
Message="The type initializer for 'Oracle.DataAccess.Client.OracleConnection' threw an exception."
Source="Oracle.DataAccess"
TypeName="Oracle.DataAccess.Client.OracleConnection"
StackTrace:
at Oracle.DataAccess.Client.OracleConnection..ctor(String connectionString)
at MBSOra.Form1.getDBConnection() in F:\temp\MBS\MBSOra\MBSOra\Form1.cs:line 105
at MBSOra.Form1.btnConnect_Click(Object sender, EventArgs e) in F:\temp\MBS\MBSOra\MBSOra\Form1.cs:line 37
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at MBSOra.Program.Main() in F:\temp\MBS\MBSOra\MBSOra\Program.cs:line 18
at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: Oracle.DataAccess.Client.OracleException
Message="The provider is not compatible with the version of Oracle client"
Source="Oracle Data Provider for .NET"
ErrorCode=-2147467259
DataSource=""
Number=-1011
Procedure=""
StackTrace:
at Oracle.DataAccess.Client.OracleInit.Initialize()
at Oracle.DataAccess.Client.OracleConnection..cctor()
InnerException:

-----------------------------------------------------------------------------------------

This happen when I am using Windows Server 2008 32 bit Standard edition.

When I run the same code in Win XP to access to the same Oracle 11g Database server I have no error at all.

Any help?

Ming Man