error:
[HttpException (0x80004005): Unable to validate data.]
System.Web.Configuration.MachineKey.GetDecodedData (Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Int32& dataLength) +196
System.Web.UI.LosFormatter.Deserialize(String input) +60
[HttpException (0x80004005): Authentication of viewstate failed. 1) If this is a cluster, edit <machineKey> configuration so all servers use the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. 2) Viewstate can only be posted back to the same page. 3) The viewstate for this page might be corrupted.]
System.Web.UI.LosFormatter.Deserialize(String input) +118
System.Web.UI.Page.LoadPageStateFromPersistenceMed ium() +102
[HttpException (0x80004005): Invalid_Viewstate
Client IP: 200.72.33.75
Port: 59519
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
ViewState: dDw1Mjc5MjA4NTI7dDw7bDxpPDI+Oz47bDx0PDtsPGk8MT47Pj tsPHQ8dDxwPHA8bDxEYXRhVGV4dEZpZWxkO0RhdGFWYWx1ZUZp ZWxkOz47bDxWYXJpZWRhZDtWYXJpZWRhZDs+Pjs+O3Q8aTwyMD 47QDxDYWJlcm5ldCBGcmFuYztDYWJlcm5ldCBTYXV2aWdub247 Q2FyYmVybmV0IFJvc2U7Q2FybWVuZXJlO0NoYXJkb25uYXk7R2 VuZXJpY28gQmxhbmNvO0dlbmVyaWNvIFRpbnRvO01hbGJlYztN ZXJsb3Q7TWV6Y2xhO01vc2NhdGVsO1BhaXMgVGludG87UGVkcm 8gSmltZW5lejtQZXRpdCBWZXJkb3Q7UGlub3QgTm9pcjtTYXV2 aWdub24gQmxhbmM7U2VtaWxsb247U3lyYWg7VGludG9yZXJhO1 Rvcm9udGVsOz47QDxDYWJlcm5ldCBGcmFuYztDYWJlcm5ldCBT YXV2aWdub247Q2FyYmVybmV0IFJvc2U7Q2FybWVuZXJlO0NoYX Jkb25uYXk7R2VuZXJpY28gQmxhbmNvO0dlbmVyaWNvIFRpbnRv O01hbGJlYztNZXJsb3Q7TWV6Y2xhO01vc2NhdGVsO1BhaXMgVG ludG87UGVkcm8gSmltZW5lejtQZXRpdCBWZXJkb3Q7UGlub3Qg Tm9pcjtTYXV2aWdub24gQmxhbmM7U2VtaWxsb247U3lyYWg7VG ludG9yZXJhO1Rvcm9udGVsOz4+Oz47Oz47Pj47Pj47PoHanLMJ CY3rZfNZMhvwA8kBK1ma
Http-Referer:
http://www.gttttttt.com/productores/cubas/ejemplo6.aspx
Path: /productores/cubas/ejemplo6.aspx.]
System.Web.UI.Page.LoadPageStateFromPersistenceMed ium() +448
System.Web.UI.Page.LoadPageViewState() +18
System.Web.UI.Page.ProcessRequestMain() +447