Unable to attach source code for review

I’ve uploaded my addon for prelim review but when I try to attach source it simply hangs. I’ve tried several time in Chrome and Firefox. I even reduced the source size from 1.6 MB to 100KB but still the same response. The “Add Version” simply don’t get enabled even after long time.

What to do?

Here is the screen snapshot

You can submit the add-on without the sources, and submit the sources later, on the version page.