I have created a custom image control everything works fine. It renders in the browser fine.

But when I drop the control in the webform, set the properties, go to html view, then back to design view. I get a gray box where my custom control was that says "Error Creating Custom Control" and then a message of "Server Tag is not well formed".

Anyone know why this would happen?
Here is how it looks in HMTL view from within the IDE.
Code:
<JHA:JHAImageRollover id="JHAImageRollover1" onclick="http://www.google.com" runat="server" BaseImage="/common/images/btn_search.gif" RolloverImage="/common/images/btn_cancel.gif"></JHA:JHAImageRollover>