DB Connectivity with SQL Server using SqlClient : [IIS and DB are on different machines.]

<%@ Page Language="VB" %>
<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.Data.SqlClient" %>
<script runat="server">

Sub Page_Load(sender As Object, e As EventArgs)

Dim myConnectionString As String = "Server=IP Address of DB Server;Database=DB Name;User ID=uname;Password=pwd;Integrated Security=SSPI"
Dim myConnection As New SqlConnection(myConnectionString)
Dim cmdTest As SqlCommand
Dim rdrTest As SqlDataReader
myConnection.Open()

cmdTest = New SqlCommand ("select * from tblAdmin")
rdrTest = cmdTest.ExecuteReader

gridTest.DataSource = rdrTest
gridTest.DataBind
rdrTest.Close
cmdTest.Dispose
myConnection.Close

End Sub

Errors occurred :

[SqlException: ƒ†[ƒU[ 'DB Server\Guest' ‚̓ƒOƒCƒ“‚Å‚«‚Ü‚¹‚ñ‚Å‚µ‚½B]
System.Data.SqlClient.ConnectionPool.GetConnection(Boolean& isInTransaction) +472
System.Data.SqlClient.SqlConnectionPoolManager.GetPooledConnection(SqlConnectionString options, Boolean& isInTransaction) +372
System.Data.SqlClient.SqlConnection.Open() +384
ASP.test_sqlclient_sqlserver_aspx.Page_Load(Object sender, EventArgs e) +43
System.Web.UI.Control.OnLoad(EventArgs e) +67
System.Web.UI.Control.LoadRecursive() +35
System.Web.UI.Page.ProcessRequestMain() +731

Please kindly suggest some solution

Regards
Mahesh