I hear some problems in opening accounts by Americans, dont know if you are. However, its all tied up with extra security nowdays unfortunately. I never encounter those problems but I have Spanish citizenship as well.
You are to get more facts, these organisation is for Americans Abroad that I belong for a long time; and they have lobby group working to ease the opening and closing of bank accounts by Americans abroad, maybe they can direct you with better info
www.aaro.org
hope it helps