AspX Page Connection Error using sqlserver

Dear i am using visual studio.net........ when i connect database (in sqlserver) using sqldataAdapter with datagrid in visual basic.net every thing work properly......... but when i use the same in asp.net then i get an error message on the resultant explorer page give below.

Server Error in '/studentData' Application.
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Login failed for user 'RAMIZSARDAR\ASPNET'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Login failed for user 'RAMIZSARDAR\ASPNET'.

Source Error:

Line 85: 'Put user code to initialize the page here
Line 86: Dim ds As New DataSet()
Line 87: SqlDataAdapter1.Fill(ds)
Line 88: DataGrid1.DataSource = ds.Tables(0)
Line 89: DataGrid1.DataBind()

Source File: c:\inetpub\wwwroot\studentData\WebForm1.aspx.vb Line: 87

Stack Trace:

[SqlException: Login failed for user 'RAMIZSARDAR\ASPNET'.]
System.Data.SqlClient.SqlConnection.Open()
System.Data.Common.DbDataAdapter.QuietOpen(IDbConnection connection, ConnectionState& originalState)
System.Data.Common.DbDataAdapter.Fill(Object data, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
System.Data.Common.DbDataAdapter.Fill(DataSet dataSet)
studentData.WebForm1.Page_Load(Object sender, EventArgs e) in c:\inetpub\wwwroot\studentData\WebForm1.aspx.vb:87
System.Web.UI.Control.OnLoad(EventArgs e)
System.Web.UI.Control.LoadRecursive()
System.Web.UI.Page.ProcessRequestMain()

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Version Information: Microsoft .NET Framework Version:1.0.3705.0; ASP.NET Version:1.0.3705.0

Plz solve my problem and Reply me on ramiz_ch@.hotmail.com
Plz solve my problem and Reply me on ramiz_ch@.hotmail.com
Plz solve my problem and Reply me on ramiz_ch@.hotmail.com

Ramizwell, yes. if you use the same code in VB.NET/WIndows forms it'll run under the security context of the currently logged-in user. i.e. YOU.

under ASP.NET it runs by default as the ASP.NET guest account, MACHINENAME\ASPNET

you need to add ASPNET to the SQL Server permissions list, OR run ASP.NET as a different user, OR specify a SQL Server auth account in your connection string.

this question has been covered over and over in these forums. try the FAQ, if it's not in there I'll be shocked and amazed.