Error after hosting the asp .net web site

Server Error in '/RSBYREPORTS' Application.
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Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: Could not load file or assembly 'System.Core, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file specified.

Source Error:


Line 28:            <assemblies>
Line 29:                <add assembly="System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
Line 30:                <add assembly="System.Core, Version=3.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
Line 31:                <add assembly="System.Web.Extensions, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
Line 32:                <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>


Source File: F:\rajithaonline\RSBYREPORTS\RSBY reports site 20 Oct 2012\web.config    Line: 30

Assembly Load Trace: The following information can be helpful to determine why the assembly 'System.Core, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' could not be loaded.


WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].