Created Unassigned: ToggleButtonExtender image not displaying in Disabled mode [27713]

<tr>
<td>Primary:
</td>
<td>
<ajax:ToggleButtonExtender runat="server" ID="tbePrimaryDept"
TargetControlID="chkPrimaryDept"
CheckedImageUrl="EmployeeCentralImages/yes.PNG"
UncheckedImageUrl="EmployeeCentralImages/no.PNG"
DisabledCheckedImageUrl="EmployeeCentralImages/yes.PNG"
DisabledUncheckedImageUrl="EmployeeCentralImages/no.PNG"
ImageHeight="25" ImageWidth="57">
</ajax:ToggleButtonExtender>
<ext:CheckBox ID="chkPrimaryDept" runat="server" />
<%-- <ext:RadioButtonList ID="rblPrimaryDepartment" runat="server" RepeatDirection="Horizontal" RepeatColumns="2" CssClass="Required">
<asp:ListItem Text="Yes" Value="1"></asp:ListItem>
<asp:ListItem Text="No" Value="0"></asp:ListItem>
</ext:RadioButtonList>--%>
</td>
</tr>