Rad tabs overlapping each other

[Parimal]

we are  using RadTabStrip in our project.functionality wise its works good.However,its giving me designing issues,tabs are overlapping with each other .please see attached screenshot  

below is my code

<telerik:RadTabStrip ID="RadTabStrip1" Skin="Default" Orientation="HorizontalTop" runat="server" SelectedIndex="0" MultiPageID="RadMultipage1"
            ShowBaseLine="true" >
            <Tabs>
                <telerik:RadTab Text="Advanced Search" Selected="true">
                </telerik:RadTab>
            </Tabs>
            <Tabs>
                <telerik:RadTab Text="Skill Search">
                </telerik:RadTab>
            </Tabs>
        </telerik:RadTabStrip>