[Solved] ASP.Net Button not displaying (not visible) after publishing in IIS Server

New to ASP.NET and IIS.  I have a button on an ASP page that works fine in Visual Studio (page reset), but once I publish it to the web server (IIS) it's not visible. 

Instead it appears as a blue line if the browser area is selected. 

The rest of the page works fine, although there are no other buttons.

Could be an IIS issue, or related to buttons in general.  Not sure. 

Any ideas?