Some URLs are not loaded

Hi, I opened a project that I haven't touched for a while, and there is three URLs that are not loaded. They return status 404. All other URLs related to Ext.NET seems to get loaded correctly.

These are the URLS:

• /extjs/ext-all-debug-js/ext.axd?v=4.8.1
• /extnet/extnet-all-debug-js/ext.axd?v=4.8.1
• /extnet/extnet-init-js/ext.axd?a3f89e51ece84c54b3dcd345fe0d74bd

What could be wrong?

I have two other projects running with the same setup, and they work. I can't find the difference.

I figured out now. It was missing this:
[assembly: WebActivatorEx.PreApplicationStartMethod(typeof(As pApp.ExtNetConfig), "Start")]