title: Breakpoints working in MXML files, but not ActionScript files : Flash Builder 4
body: <p>I am trying to debug the Flex application. I am able to set breakpoints in mxml file, and application breaks on those breakpoints. But when I set breakpoint in <code>as</code> files, I don't see the breakpoint marker, though in breakpoints window I am shown the line no. And when I start my debugging session, the application does not break at that point.</p>
  
  <p>what could be wrong?</p>