Here's the original report. Be warned that it is a .pdf file of 111 pages. If you don't like to go straight to PDF's start here, it titled "Strategic Communication." It's dated September, but seems to have been released to the public at the end of November.

I searched "Defence Science Board" on Google & in addition to the Board's web site, I found other summaries of the report. The solution to this problem being better communication & propaganda seems to miss the point entirely.

Found this on p. 49:
"Thus the critical problem in American public diplomacy directed toward the Muslim World is not one of "dissemination of information," or even one of crafting and delivering the "right" message. Rather, it is a fundamental problem of credibility. Simply, there is none — the United States today is without a working channel of communication to the world of Muslims and of Islam. Inevitably therefore, whatever Americans do and say only serves the party that has both the message and the "loud and clear" channel: the enemy."