MSDE2000にＩＰアドレスで接続できない

namespace SampleConnectDB
{
	/// <summary>
	/// ConnectDatabase の概要の説明です。
	/// </summary>
	public class ConnectDatabase
	{

		private string strConn ;
		private string strUserID = string.Empty;
		private string strPassWord = string.Empty;
		private string strDataBase = string.Empty;
		private string strServerAddress = string.Empty;
		private int strTimeOut = 0;
		private string strError = null;
		private SqlConnection myConnection;
		private SqlCommand myCmd;
		private SqlDataAdapter da;
		private DataTable dt;

		public ConnectDatabase()
		{
			// 
			// TODO: コンストラクタ ロジックをここに追加してください。
			//
		}
		

		/// <summary>
		/// Template
		/// </summary>
		public void hoge()
		{
		}

		/// <summary>
		/// ログインユーザ
		/// </summary>
		public string UserID
		{
			set { strUserID = value;}
		}

		/// <summary>
		/// パスワード
		/// </summary>
		public string PassWord
		{
			set { strPassWord = value;}
		}

		/// <summary>
		/// 接続データベース名
		/// </summary>
		public string DataBase
		{
			set { strDataBase = value;}
		}

		/// <summary>
		/// サーバアドレス
		/// </summary>
		public string ServerAddress
		{
			set { strServerAddress = value;}
		}

		/// <summary>
		/// 接続待ち時間
		/// </summary>
		public int TimeOut
		{
			set { strTimeOut = value;}
		}

		/// <summary>
		/// ＤＢを開く
		/// </summary>
		public DataTable ExecSearchSQL(string strSQL)
		{
			try
			{
				strConn = "user id=" + strUserID + ";"
					+ "password=" + strPassWord + ";"
					+ "initial catalog=" + strDataBase + ";"
					+ "data source=" + strServerAddress + ";"
					+ "Connect Timeout=" + strTimeOut.ToString() + ";"
					;
				myConnection = new SqlConnection(strConn);
				myConnection.Open();
				myCmd = new SqlCommand(strSQL,myConnection);
				da = new SqlDataAdapter();
				da.SelectCommand = myCmd;
				DataSet ds = new DataSet();
				da.Fill(ds);
				dt = ds.Tables[0];
				myConnection.Close();
			}
			catch(ArgumentException e)
			{
				strError = e.ToString();
			}
			catch(Exception e2)
			{
				strError = e2.ToString();
			}
			return dt;
		}
	}
}