RadAJAXManager in IE 9

[Samir Vaidya]

I have been using the RadAJAXManager available in Telerik RadControls Q2 2010 and while running my application in IE 9, I have been receiving the following error message while my RadAJAXLoadingPanel is displaying the image:

Line: 15
Error: Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 12030

I am not quite sure why I am receiving this error message.  Below is the code that I am using for my postback on the checkboxchanged event within the RadGrid:

<asp:wizardstep id="wizStepClassReg" title="Class Registration" runat="server" steptype="Step">
            <asp:validationsummary id="vldSummaryCourseSelection" validationgroup="selectedCourses"
                displaymode="SingleParagraph" showmessagebox="true" runat="server" forecolor="Red" />
            <asp:customvalidator id="vldCustomCourseSelection" runat="server" onservervalidate="vldCustomCourseSelection_ServerValidate"
                validationgroup="selectedCourses" errormessage="Please select at least one course for registration"
                display="None" />
            <telerik:radajaxmanager id="radAJAXMgr" enableajax="true" runat="server" defaultloadingpanelid="radAJAXLoadingPanel">
                <ajaxsettings>
                    <telerik:ajaxsetting ajaxcontrolid="gv">
                        <updatedcontrols>
                            <telerik:ajaxupdatedcontrol controlid="gv" loadingpanelid="radAJAXLoadingPanel" />
                        </updatedcontrols>
                    </telerik:ajaxsetting>
                </ajaxsettings>
            </telerik:radajaxmanager>
            <telerik:radajaxloadingpanel id="radAJAXLoadingPanel" runat="server" skin="Black" />
            <telerik:radgrid id="gv" autogeneratecolumns="false" showfooter="false" runat="server"
                cellspacing="0" gridlines="None" allowpaging="true" allowsorting="true" skin="Outlook"
                onpageindexchanged="RadGrid1_PageIndexChanged" showgrouppanel="false" onsortcommand="RadGrid1_SortCommand"
                onpagesizechanged="RadGrid1_PageSizeChanged" onitemdatabound="gv_ItemDataBound">
                <mastertableview datakeynames="CourseID" pagesize="25">
                    <commanditemsettings exporttopdftext="Export to PDF"></commanditemsettings>
                    <rowindicatorcolumn filtercontrolalttext="Filter RowIndicator column">
                    </rowindicatorcolumn>
                    <expandcollapsecolumn filtercontrolalttext="Filter ExpandColumn column">
                    </expandcollapsecolumn>
                    <groupbyexpressions>
                        <telerik:gridgroupbyexpression>
                            <selectfields>
                                <telerik:gridgroupbyfield fieldalias="AgeGroup" fieldname="CategoryDesc" />
                                <telerik:gridgroupbyfield fieldalias="Subject" fieldname="SubjectDesc" />
                            </selectfields>
                            <groupbyfields>
                                <telerik:gridgroupbyfield fieldname="CategoryDesc" sortorder="None" />
                                <telerik:gridgroupbyfield fieldname="SubjectDesc" sortorder="None" />
                            </groupbyfields>
                        </telerik:gridgroupbyexpression>
                    </groupbyexpressions>
                    <columns>
                        <telerik:gridboundcolumn uniquename="CourseID" readonly="true" display="false" datafield="CourseID" />
                        <telerik:gridtemplatecolumn>
                            <itemtemplate>
                                <asp:checkbox runat="server" id="chk" oncheckedchanged="CheckChanged" autopostback="true" />
                            </itemtemplate>
                        </telerik:gridtemplatecolumn>
                        <telerik:gridboundcolumn headertext="Age Group" datafield="CategoryDesc" />
                        <telerik:gridboundcolumn headertext="Subject" datafield="SubjectDesc" />
                        <telerik:gridboundcolumn uniquename="CourseDescription" datafield="CourseDescription" headertext="Ages" />
                        <telerik:gridboundcolumn headertext="Term" datafield="term.TermDesc" />
                        <telerik:gridboundcolumn headertext="Course Cost" datafield="Cost" dataformatstring="{0:C}" />
                        <telerik:gridboundcolumn headertext="Length (Weeks)" datafield="CourseLength" />
                        <telerik:gridboundcolumn headertext="Days" datafield="Days" />
                        <telerik:gridboundcolumn headertext="Start Time" datafield="StartTime" />
                        <telerik:gridboundcolumn headertext="End Time" datafield="EndTime" />
                        <telerik:gridboundcolumn headertext="Location" datafield="location.LocationDesc" />
                    </columns>
                    <editformsettings>
                        <editcolumn filtercontrolalttext="Filter EditCommandColumn column">
                        </editcolumn>
                    </editformsettings>
                </mastertableview>
                <headercontextmenu cssclass="GridContextMenu GridContextMenu_Default">
                </headercontextmenu>
            </telerik:radgrid>
        </asp:wizardstep>

Please advise.

[Sebastian]

Hi Samir,

Possible reasons for this error and potential solutions are listed in this public forum post. Additionally, you may consider migrating to the latest version 2011.1.413 of our AJAX controls to see whether the issue vanishes. Note that our AJAX components officially support IE 9 since version 2011.1.315 of the suite.

Kind regards,
Sebastian
the Telerik team