"Walo" wrote:

> I searched in the internet and there was no solution that worked for
> me. The funny thing is, that the same application work fine on a
> different server.
>
> Thanks for every help!
>
> Here is the complete Error-Code:
>
> Validation of viewstate MAC failed. If this application is hosted by a
> Web Farm or cluster, ensure that <machineKey> 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: System.Web.HttpException: Validation of viewstate
> MAC failed. If this application is hosted by a Web Farm or cluster,
> ensure that <machineKey> configuration specifies the same validationKey
>
> and validation algorithm. AutoGenerate cannot be used in a cluster.
>
>
> Source Error:
>
>
> [No relevant source lines]
>
>
> Source File: c:\windows\Microsoft.NET\Framework\v2.0.50727\Temporary
> ASP.NET
> Files\konzessionen-rtvg.gd\104dd2aa\1bab3e30\App_Web_ylotuhwm.30.cs
> Line: 0
>
>
> Stack Trace:
>
>
> [HttpException (0x80004005): Unable to validate data.]
>    System.Web.Configuration.MachineKeySection.GetDecodedData(Byte[]
> buf, Byte[] modifier, Int32 start, Int32 length, Int32& dataLength)
> +2546764
>    System.Web.UI.ObjectStateFormatter.Deserialize(String inputString)
> +214
>
>
> [ViewStateException: Invalid viewstate.
>         Client IP: 146.159.26.39
>         Port: 2247
>         User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;
> SV1;
> ..NET CLR 1.1.4322; .NET CLR 2.0.50727)
>         ViewState: /wEPDwUJMjk2NTc0NzkzZGQn2gvYVk8zb1xIq0Qh0GLgA3/xpA==
>
>         Referer:
> http://mekbuda.gd.ad.prod/konzessionen-rtvg.gd/Login.aspx?ReturnUrl=%...
>
>         Path: /konzessionen-rtvg.gd/Login.aspx]
>
>
> [HttpException (0x80004005): Validation of viewstate MAC failed. If
> this application is hosted by a Web Farm or cluster, ensure that
> <machineKey> configuration specifies the same validationKey and
> validation algorithm. AutoGenerate cannot be used in a cluster.]
>    System.Web.UI.ViewStateException.ThrowError(Exception inner, String
> persistedState, String errorPageMessage, Boolean macValidationError)
> +116
>    System.Web.UI.ObjectStateFormatter.Deserialize(String inputString)
> +251
>
>
> System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserializ­e(String
>
> serializedState) +4
>    System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter,
> String serializedState) +37
>    System.Web.UI.HiddenFieldPageStatePersister.Load() +220
>    System.Web.UI.Page.LoadPageStateFromPersistenceMedium() +83
>    System.Web.UI.Page.LoadAllState() +35
>    System.Web.UI.Page.ProcessRequestMain(Boolean
> includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
> +6953
>    System.Web.UI.Page.ProcessRequest(Boolean
> includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
> +154
>    System.Web.UI.Page.ProcessRequest() +86
>    System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
> +18
>    System.Web.UI.Page.ProcessRequest(HttpContext context) +49
>    ASP.login_aspx.ProcessRequest(HttpContext context) in
> c:\windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET
> Files\konzessionen-rtvg.gd\104dd2aa\1bab3e30\App_Web_ylotuhwm.30.cs:0
>
>
> System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionSt­ep.Execute()
>
> +154
>    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&
>
> completedSynchronously) +64
>
>
> ---------------------------------------------------------------------------­-----
>
> Version Information: Microsoft .NET Framework Version:2.0.50727.42;
> ASP.NET Version:2.0.50727.42
>
>