Forbindelse til MS-SQL

Jeg får beskeden: System.Data.SqlClient.SqlException: SQL Server does not exist or access denied. at System.Data.SqlClient.ConnectionPool.GetConnection(Boolean& isInTransaction)

Men jeg ved databasen eksisterer, og at min workstation har det navn.

DBen er en MSDE

kode:
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            string strConnection = "Integrated Security=SSPI;";
            strConnection += "initial catalog=PhoneReg;server=PC-WS-WORK-001";
            strConnection += "Connect Timeout=30";
            lblDatasrc.Text = strConnection;
            SqlConnection objConnection = new SqlConnection(strConnection);

            try
            {
                objConnection.Open();
                lblConOpen.Text = "Connection opened successfully";
                objConnection.Close();
                lblConClose.Text = "Connection Closed!";
            }

            catch (Exception b)
            {
                lblConOpen.Text = "Connection failed to open!";
                lblConClose.Text = b.ToString();
            }