Hello

Following is a fairly disturning error message I get when log into a website v 5.6.01. The error msg iterrupts pass through to the site - it allows access if you click on the next page prompt at the end far right of message, but by that stage I reckon I will have frightened off every user.

This started to happen after I changed the Home page - swaped it for another page. Perhapsi t is requesting data from some of the old pages.

Appreciate if someone dares to look at this.

Thanks km

An error has occurred.
DotNetNuke.Services.Exceptions.PageLoadException: 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.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. ---> System.Web.UI.ViewStateException: Invalid viewstate. Client IP: 123.208.32.186 Port: 50893 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b11) Gecko/20100101 Firefox/4.0b11 ViewState:
/wEPDwULLTE2NDIyOTEzMjkPZBYGZg8WAh4EVGV4dAU+PCFET0NUWVBFIEhUTUwgUFVCTElDICItLy9XM0MvL0RURCBIVE1MIDQuMCBUcmFuc2l0aW9uYWwvL0VOIj5kAgEPZBYOAgQPFgIeB1Zpc2libGVoZAIFDxYCHgdjb250ZW50Bac
BVGhlIEhlYXJ0IGEgUHJheWVyIFdhcnJpb3IgRm9ydW0gdG8gZW5jb3VyYWdlIGZhaXRoIGluIEplc3VzIENocmlzdCwgcHJvY2xhaW0gSGlzIG5hbWUgYW5kIHRvIGVuY291cmFnZSBwZW9wbGUgdG8gcHJheSBpbiBIaXMgbmFtZSB0byB0aGUgS
GVhdmVubHkgRmF0aGVyIHRvIGdsb3J5IEhpbS5kAgYPFgIfAgWKAVRoZSBIZWFydCAtIEtleSB0byB0aGUgSGVhcnQsIFRoZSBIZWFydCBhIFByYXllciBXYXJyaW9yIEZvcnVtLCBKZXN1cywgR29kLCBKZXN1cyBsb3ZlcyB5b3UsIHRoZSBIZWFyd
CBsb2dpbiAtIHJlZ2lzdHJhdGlvbixEb3ROZXROdWtlLEROTmQCBw8WAh8CBSdDb3B5cmlnaHQgMjAxMCBieSBKIEdvbGxhbiBIb2xkaW5ncyBMdGRkAggPFgIfAgULRG90TmV0TnVrZSBkAgkPFgIfAgUJVGhlIEhlYXJ0ZAIMDxYCHwIFDUlOREVYL
CBGT0xMT1dkAgIPZBYCAgEPZBYGZg9kFgJmDxYCHwFoFgQCAQ9kFggCAw8QZGQWAGQCBw8WAh8BaGQCCQ8WAh8BaGQCCw9kFgJmDw8WBh4ISW1hZ2VVcmwFFC9pbWFnZXMvY2... --- End of inner exception stack trace --- at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidati ) at System.Web.UI.ViewStateException.
ThrowMacValidati (Exception inner, String persistedState) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState) at
 System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState) at System.Web.UI.HiddenFieldPageStatePersister.Load() at System.Web.UI.Page.LoadPageStateFromPersistenceMedium() at System.Web.UI.Page.LoadAllState() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace ---