Hi everyone, hope I can get some help on this error. I get the following error when I go to modify an address in the address book, this happens only when I change the State field, the rest of the text field update without any problems. This happens for both modifying existing addresses or adding new addresses.




<H1>Server Error in '/shop' Application.
<HR width="100%" color=silver SIZE=1>
</H1>
<H2>Invalid postback or callback argument. Event validation is enabled using &lt;pages enableEventValidation="true"/&gt; in configuration or &lt;%@ Page EnableEventValidation="true" %&gt; in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientscriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. </H2>
[color=#ffffcc>

[tr ][td ]<CODE>An]</b>location of the exception can be identified using the exception stack trace below.[/code] [/td][/tr]</TABLE>


<B>[1]

Version Information:[/1] Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3053





Version info on my deployment.

<H1>about</H1>




<SPAN id=ctl00_MainContent_lblVersion>
<UL>
<LI>1.0.1.1.............anrControls.Markdown.NET.dll
<LI>1.5.1.0.............anrControls.SmartyPants.NET.dll
<LI>1.5.2.0.............anthem.dll
<LI>0.0.0.0.............App_Licenses.dll
<LI>1.2.0.0.............BVLicensing.dll
<LI>5.3.2.20............BVSoftware.Bvc5.Core.dll
<LI>5.3.2.20............BVSoftware.Bvc5.Payment.AuthorizeNet.dll
<LI>5.3.2.20............BVSoftware.Bvc5.Payment.dll
<LI>5.3.2.20............BVSoftware.Bvc5.Shipping.FedEx.dll
<LI>5.3.2.20............BVSoftware.Bvc5.Shipping.Ups.dll
<LI>5.3.2.20............BVSoftware.Bvc5.Shipping.USPostal.dll
<LI>1.0.0.0.............BVSoftware.GoogleCheckout.dll
<LI>1.0.0.0.............BVSoftware.PaypalWebServices.dll
<LI>1.0.4...............CyberSource.dll
<LI>No Version Info.....CybsSecurity.dll
<LI>3.1.1.31029.........FreetextBox.dll
<LI>1.2.................log4net.dll
<LI>3.1.2561.0..........nsoftware.IBizPayWeb.dll
* 4.1.0.0.............paypal_base.dll
</UL>
Thanks in advance for you help.
&lt;!--
[ArgumentException]: Invalid postback or callback argument. Event validation is enabled using &lt;pages enableEventValidation=&quot;true&quot;/&gt; in configuration or &lt;%@ Page EnableEventValidation=&quot;true&quot; %&gt; in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientscriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
at System.Web.UI.ClientscriptManager.ValidateEvent(String uniqueId, String argument)
at System.Web.UI.Control.ValidateEvent(String uniqueID, String eventArgument)
at System.Web.UI.WebControls.TextBox.LoadPostData(String postDataKey, NameValueCollection postCollection)
at System.Web.UI.WebControls.TextBox.System.Web.UI.IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection)
at System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
[HttpUnhandledException]: Exception of type 'System.Web.HttpUnhandledException' was thrown.
at System.Web.UI.Page.HandleError(Exception e)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest()
at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
at System.Web.UI.Page.ProcessRequest(HttpContext context)
at ASP.myaccount_addressbook_edit_aspx.ProcessRequest(HttpContext context)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
--&gt;&lt;!--
This error page might contain sensitive information because ASP.NET is configured to show verbose error messages using &lt;customErrors mode="Off"/&gt;. Consider using &lt;customErrors mode="On"/&gt; or &lt;customErrors mode="RemoteOnly"/&gt; in production environments.--&gt;