Can't Build Project Now (Could Before)

Hello, I have a similar issue.

My project is a web app.

When build in 2013 r4.1 everything works fine.

When try to build in 2014 r1, a build progress dialog opens and stops after 2 or less seconds. No warnings, no results, no logs (?), no way to determine what happened.

If try to “Run paused”, Xojo build my app (deployment type Stand Alone). The build folder is not empty, and web app runs fine.

What I’m doing bad?

Thanks in advance for any advice.

Enrique