dynamic imageurl in imagebutton control

All--How can I use inline code to make a dynamic imageurl in imagebutton control?Here is the code that I want to be able to run...<asp:imagebutton id="Imagebutton1" runat="server" imageurl="<%= TestApplication.Web.Global.GetPathToImages() %>TestImage.gif"></asp:imagebutton>...but it just does not work.What gives?Any ideas?Note that the method called is a global, static, method.Note that this DOES work when it is part of an "image" tag or a "td" tag.What do you think?Thank you in advance. ...