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Server Error Solution

Windows 2003 Server

ASP.net 2.0 (Visual Basic)

MS SQL 2005

I use a shared hosting plan for my web site. I am getting an error message. Do you have a solution that I could purchase?

Description of how I get the error message:

This is a data driven web site. A web page is open, but is not being used (nothing is clicked for about 20 minutes). Then, after 20 minutes (or more) I click something to change the data. Then I get this error. I refresh the page, but the error remains. Then I reload the page. Then page looks OK, but the data has not changed. Then I click to change the data and then the data is updated.

Thanks

Server Error in '/' Application.

Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

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: [url removed, login to view]: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

Source Error:

The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:

1. Add a "Debug=true" directive at the top of the file that generated the error. Example:

or:

2) Add the following section to the configuration file of your application:

Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.

Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.

Stack Trace:

[CryptographicException: Padding is invalid and cannot be removed.]

[url removed, login to view](Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[]& outputBuffer, Int32 outputOffset, PaddingMode paddingMode, Boolean fLast) +1488620

[url removed, login to view](Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount) +306

[url removed, login to view]() +30

[url removed, login to view](Boolean fEncrypt, Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Boolean useValidationSymAlgo) +154

[url removed, login to view](String inputString) +152

[ViewStateException: Invalid viewstate.

Client IP: [url removed, login to view]

Port: 10973

User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5.0.6

ViewState: 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...]

[HttpException (0x80004005): Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.]

[url removed, login to view](Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) +116

[url removed, login to view](String inputString) +251

[url removed, login to view](String serializedState) +4

[url removed, login to view](IStateFormatter formatter, String serializedState) +37

[url removed, login to view]() +220

[url removed, login to view]() +83

[url removed, login to view]() +35

[url removed, login to view](Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6953

[url removed, login to view](Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +154

[url removed, login to view]() +86

[url removed, login to view](HttpContext context) +18

[url removed, login to view](HttpContext context) +49

[url removed, login to view](HttpContext context) +29

[url removed, login to view]() +154

[url removed, login to view](IExecutionStep step, Boolean& completedSynchronously) +64

Version Information: Microsoft .NET Framework Version:[url removed, login to view]; ASP.NET Version:[url removed, login to view]

Kemahiran: .NET

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