Server Error in '/aspnet' Application.
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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:\WINNT\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\aspnet\9eac2755\41537dcc\App_Web_uyn1u_cc.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) +2546764
System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) +214
[ViewStateException: Invalid viewstate.
Client IP: 185.23....
Port: 4375
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: 6hMxFLUQQhdDB5O7QqRv0duNlhP5/c1e4qzoAvptbXYI+6Oy/Yq4VWOu3U820mwHiD9dOTbfTw78xA2IO2p2pzYVeBKmMGJccwsq1DLvViOg184s6TqUscbADvsdg0OJa
ymIn8K6R4sHtnCnt4km6FqEnCn6bAUfXjP76m0ahEEih/pKwdmsk1IVrqD4OWco24XhFhEEAg28FJ9lE7tVKgaADcM2Dzwv3476IG8N9D0rO8SHHtm2+9I3Tcx1wY
UUAG6ytgRmIeSqQL4liQvWXVLyQwnbkvbL5fssE2KcJ/UA5rMULmHWuiySA9bRx05rySGPmGTYVJk9mavqZCG8KHqwRdsC2BsupVDRidAB/yJ8rJUe5Z6i79doYEfDmnovs+DvWYLyWzxv8ONLeGQSfFUPLIw4qEu/tzblYoZNdKSRMdjAOwGxP41NVecm6pOAr8JVHaAQB6FyBDKab0dWnuEEQp7OTkOVNGQwxFPaHp+ijxdJ
yjocKdliMWUfrWA+K1w/7XngwtxKRM7tLNk4+9IBB04mnA+OFUu6qLz9d/7vHPNBS+PHgm5wfZ8gFO2lP5sokgJL00Y+YtCbw82bx7+sK7k/2Q13gn04nTNEsjzLIPYrPulT2va687bRvfMrVbSQjJsLwzz3ESHf+ik7co4IUbW7FtIR0ZZPlBuNizT/Lk0jcQ788S3ZvnVc7QAgBf5w79N8vR8S1R19m/9fQ4nXr8fywFjVGzlC1rHwu+/J6za+UAEPWJWAv248sQkEOmVMa0RQMUK6MYbK9ExRBqvxCvKTyM/W+3hNM3LEgAN/cJcKtnmdo9tVXHb77tcSkQILr+i+zsf3WGQLVd5pL/l0Aaq...]
[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(Str
ing 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.vol_data_list_aspx.ProcessRequest(HttpContext context) in c:\WINNT\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\aspnet\9eac2755\41537dcc\App_Web_uyn1u_cc.0.cs:0
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Ex
ecute() +154
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64
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Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42