ahhh. very familiar to me. it could be that your hip flexors are tight. i have had the same problem. when they are tight it causes your hip shelf to rotate. this is what causes pain. here is an example of a really good hip flexor stretch. <a href="http://www.exrx.net/Stretches/HipFle...HipFlexor.html">http://www.exrx.net/Stretches/HipFle...HipFlexor.html</a> my hips were hurting recently and i realized i hadn't done that stretch in a while. it is great.