Website Panel (.Net Panel)

[primagic]

I have installed Website Panel on my Windows Server 64bit.

It has installed correctly, however when I login I get the following error message:

 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\Framework64\v2.0.50727\Temporary ASP.NET Files\root\0137d8f1\ee2cd65c\App_Web_-0usk33x.0.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) +341
   System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) +303

[ViewStateException: Invalid viewstate. 
	Client IP: 81.159.236.18
	Port: 62822
	User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8 (.NET CLR 3.5.30729)
	ViewState: /wEPDwUJMjExNjc5MzQyD2QWAgIDD2QWAgIBD2QWAmYPZBYEAgEPZBYCZg9kFgICBQ9kFgJmD2QWBgIKDw9kFgIeBXZhbHVlZWQCFg8QZA8WAWYWARAFB0VuZ2xpc2gFBWVuLVVTZxYBZmQCGg8QZA8WAWYWARAFC0VuZXJneSBCbHVlBQdEZWZhdWx0ZxYBZmQCAg9kFgICBQ9kFgJmDxYCHgRUZXh0BQUxLjAuMWQYAQUeX19Db250cm9sc1JlcXVpcmVQb3N0QmFja0tleV9fFgEFHWN0bDAyJGN0bDAxJGN0bDAwJGNoa1JlbWVtYmVyzvgErR7Z3AHJ717JRifS2CqB8AE=
	Referer: [URL unfurl="true"]http://87.106.106.242:9001/Default.aspx?pid=Login&ReturnUrl=/Default.aspx[/URL]
	Path: /Default.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) +160
   System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) +4532241
   System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState) +88
   System.Web.UI.HiddenFieldPageStatePersister.Load() +4497345
   System.Web.UI.Page.LoadPageStateFromPersistenceMedium() +4454395
   System.Web.UI.Page.LoadAllState() +50
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4479040
   System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4474336
   System.Web.UI.Page.ProcessRequest() +91
   System.Web.UI.Page.ProcessRequest(HttpContext context) +319
   ASP.default_aspx.ProcessRequest(HttpContext context) in c:\WINDOWS\Microsoft.NET\Framework64\v2.0.50727\Temporary ASP.NET Files\root\0137d8f1\ee2cd65c\App_Web_-0usk33x.0.cs:0
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +638
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +177

What is this error and why does it occur? How can I solve it

Thanks

 

[eritguy]

Check this post out:

http://forums.asp.net/t/955145.aspx

Hopefully you can find a workaround at a minimum.