<script>
    // Place/load this script after the ScriptManager
    if (Telerik.Web.UI.RadSpreadsheet) {
        Telerik.Web.UI.RadSpreadsheet.prototype.original_initialize = Telerik.Web.UI.RadSpreadsheet.prototype.initialize;
        Telerik.Web.UI.RadSpreadsheet.prototype.initialize = function () {
            this.original_initialize();
            this.add_parentShown(this.get_element());
        }
        Telerik.Web.UI.RadSpreadsheet.prototype.repaint = function () {
            this.get_kendoWidget().refresh()
        }
    }
</script>

<telerik:RadWizard runat="server" ID="RadWizard1">
    <WizardSteps>
        <telerik:RadWizardStep ID="WizardStep1" StepType="Start">
            Step 1
        </telerik:RadWizardStep>
        <telerik:RadWizardStep ID="WizardStep3">
            <telerik:RadSpreadsheet runat="server" ID="RadSpreadsheet1"></telerik:RadSpreadsheet>
        </telerik:RadWizardStep>
        <telerik:RadWizardStep ID="WizardStep4" StepType="Finish">
            Finish step
        </telerik:RadWizardStep>
        <telerik:RadWizardStep ID="WizardStep5" StepType="Complete">
            Completed!
        </telerik:RadWizardStep>
    </WizardSteps>
</telerik:RadWizard>