Error Creating Database On Windows CE 5.0, CF 3.5 Beta

Hi,
I'm using VS2005, .NET Framework Version 2.0.50727 on Windows Vista Business.
I wish to implement a database in my mobile device which is using Windows CE 5.0, .NET Compact Framework 3.5 Beta, which version of SQL server should I install into the device?
I've tried using SQL mobile 2005 and SQL Server 2005 Compact Edition but it won't work. I'm having a Can't find PInvoke DLL 'sqlceme30.dll' error when I try to run the following block of code:





Code Block

private void button1_Click(object sender, EventArgs e)

{




SqlCeConnection sqlCeConnection = null;

MessageBox.Show("Entering try block");

try

{


if (!File.Exists(@"My DocumentsTest.sdf"))

{


SqlCeEngine sqlCeEngine = new SqlCeEngine(@"Data Source = My DocumentsTest.sdf");

sqlCeEngine.CreateDatabase();

MessageBox.Show("Create successful");

}

sqlCeConnection = new SqlCeConnection(@"Data Source = My DocumentsTest.sdf");

sqlCeConnection.Open();

MessageBox.Show("Open successful");

}

catch (Exception ex)

{


MessageBox.Show(ex.Message);

}

finally

{


if (sqlCeConnection != null)

sqlCeConnection.Close();

}



}



Can anyone please tell me how to solve this problem? Thanks in advance