Due to changing atmospheric/solar conditions throughout the day the frequencies you'll be able to receive will change. Broadcasters transmit on assorted frequencies to compensate for this problem. Below are some links to shortwave news sources that I use to try and get signal.

BBC Shortwave

World News in English

Middle East Broadcasts
I just found this last one and so far I haven't had much luck with it but you have a better radio than mine.

Enjoy!

-Blast