ERROR :( HELP TAB view....

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Parser Error
Description: An error occurred during the parsing of a resource required to
service this request. Please review the following specific parse error
details and modify your source file appropriately.

Parser Error Message: File or assembly name Microsoft.Web.UI.WebControls, or
one of its dependencies, was not found.

Source Error:

Line 1: <%@ Import Namespace="Microsoft.Web.UI.WebControls" %>
Line 2: <%@ Register TagPrefix="mytab"
Line 3: Namespace="Microsoft.Web.UI.WebControls"
Line 4: Assembly="Microsoft.Web.UI.WebControls, Version=1.0.2.226,
Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>

Source File: C:\Inetpub\wwwroot\WebApplication15\WebForm1.aspx Line: 2

Assembly Load Trace: The following information can be helpful to determine
why the assembly 'Microsoft.Web.UI.WebControls' could not be loaded.

=== Pre-bind state information ===
LOG: DisplayName = Microsoft.Web.UI.WebControls, Version=1.0.2.226,
Culture=neutral, PublicKeyToken=31bf3856ad364e35
(Fully-specified)
LOG: Appbase = file:///C:/Inetpub/wwwroot/WebApplication15
LOG: Initial PrivatePath = bin
Calling assembly : (Unknown).
===

LOG: Publisher policy file is not found.
LOG: No redirect found in host configuration file
(C:\WINNT\Microsoft.NET\Framework\v1.1.4322\aspnet.config).
LOG: Using machine configuration file from
C:\WINNT\Microsoft.NET\Framework\v1.1.4322\config\machine.config.
LOG: Post-policy reference: Microsoft.Web.UI.WebControls, Version=1.0.2.226,
Culture=neutral, PublicKeyToken=31bf3856ad364e35
LOG: Attempting download of new URL
file:///C:/WINNT/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET
Files/webapplication15/6d24d0f0/3cacb3a7/Microsoft.Web.UI.WebControls.DLL.
LOG: Attempting download of new URL
file:///C:/WINNT/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET
Files/webapplication15/6d24d0f0/3cacb3a7/Microsoft.Web.UI.WebControls/Micros
oft.Web.UI.WebControls.DLL.
LOG: Attempting download of new URL
file:///C:/Inetpub/wwwroot/WebApplication15/bin/Microsoft.Web.UI.WebControls
..DLL.
LOG: Attempting download of new URL
file:///C:/Inetpub/wwwroot/WebApplication15/bin/Microsoft.Web.UI.WebControls
/Microsoft.Web.UI.WebControls.DLL.
LOG: Attempting download of new URL
file:///C:/WINNT/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET
Files/webapplication15/6d24d0f0/3cacb3a7/Microsoft.Web.UI.WebControls.EXE.
LOG: Attempting download of new URL
file:///C:/WINNT/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET
Files/webapplication15/6d24d0f0/3cacb3a7/Microsoft.Web.UI.WebControls/Micros
oft.Web.UI.WebControls.EXE.
LOG: Attempting download of new URL
file:///C:/Inetpub/wwwroot/WebApplication15/bin/Microsoft.Web.UI.WebControls
..EXE.
LOG: Attempting download of new URL
file:///C:/Inetpub/wwwroot/WebApplication15/bin/Microsoft.Web.UI.WebControls
/Microsoft.Web.UI.WebControls.EXE.