I am having some trouble getting the styling to work on my RadSlider. Below is the code that I am using, which shows up great at design time, but at runtime, the slider looks very basic and plain. What can be wrong?
<telerik:RadSlider ID="rsActivityLevel" runat="server" ItemType="item"
Height="50px" AnimationDuration="400" CssClass="ItemsSlider"
ShowIncreaseHandle="false" ShowDecreaseHandle="false"
ThumbsInteractionMode="Free" >
<Items>
<telerik:RadSliderItem Text="1-3 Months" Value="1" Font-Bold="true" BackColor="Red" Font-Overline="true" ForeColor="White"/>
<telerik:RadSliderItem Text="3-6 Months" Value="2" Font-Bold="true" BackColor="Purple" Font-Overline="true" ForeColor="White"/>
<telerik:RadSliderItem Text="6-12 Months" Value="3" Font-Bold="true" BackColor="Aqua" Font-Overline="true" ForeColor="White"/>
<telerik:RadSliderItem Text=">12 Months" Value="4" Font-Bold="true" BackColor="Blue" Font-Overline="true" ForeColor="White"/>
</Items>
</telerik:RadSlider>
<telerik:RadSlider ID="rsActivityLevel" runat="server" ItemType="item"
Height="50px" AnimationDuration="400" CssClass="ItemsSlider"
ShowIncreaseHandle="false" ShowDecreaseHandle="false"
ThumbsInteractionMode="Free" >
<Items>
<telerik:RadSliderItem Text="1-3 Months" Value="1" Font-Bold="true" BackColor="Red" Font-Overline="true" ForeColor="White"/>
<telerik:RadSliderItem Text="3-6 Months" Value="2" Font-Bold="true" BackColor="Purple" Font-Overline="true" ForeColor="White"/>
<telerik:RadSliderItem Text="6-12 Months" Value="3" Font-Bold="true" BackColor="Aqua" Font-Overline="true" ForeColor="White"/>
<telerik:RadSliderItem Text=">12 Months" Value="4" Font-Bold="true" BackColor="Blue" Font-Overline="true" ForeColor="White"/>
</Items>
</telerik:RadSlider>