Problem with Image button control

Dear friends! I have following problem. I am using image button control in my datalist which shows the image of a particular product. Now the name of my image is stored in database which will come dynamically and will be displayed on the front end. I am using a following code: ImageUrl='FolderName/' id="Imagebutton1" > but it is not showing the image.When I checked with view source of the page the imageurl shows the actual text of the server side script I have written above. Please note I am not using beta version of .net It is 1.0.3 version Please help..