problem with Global.asax

Hi..

I have a problem with Global.asax . All my project have same problem
when press Ctrl + F8 .
I don't know why this error is being caused. :(
please can someone help me with this.

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Server Error in '/WebApp01' Application.
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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: Could not load type 'WebApp01.Global'.

Source Error:

Line 1: <%@ Application Codebehind="Global.asax.vb"
Inherits="WebApp01.Global" %>

Source File: c:\inetpub\wwwroot\WebApp01\global.asax Line: 1

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Thanks so much..