Dynamic Skin and Images in RadControls

[Waleed Seada]

Dear All,

I am implementing a dynamic change of the site theme.
My point is that; 
If I need to create/have custom images and those to be loaded according to the current selected theme for any RadControl that support images like Menu/Grid/ etc .... and if this control is placed inside User Control

How can I assign these Images to RadControls in this case.

I tried for RadMenu to do this:
ClickedImageUrl="App_Themes/<%= Page.Theme %>/Menu/Img/arrow.gif"

But it isn't working ...

Any Ideas
Best regards
Waleed