Your smiley isn't smiling right now...and it's a tad frightening! Just teasing!! I'd be pissed off also if I were you. Now it sounds like you have a conflict with your hairs...which may be the very cause for you pose player not working. Something in your cc is affecting both of them so it seems like you may need to go through your cc and see if you have any bad files, corrupt cc or even sims 2 content downloaded. I think you should try using custards tool, I think that will go through your cc and help you determine what is bad or not.
I don't use it but I've heard only positives on it.
Good luck hun!! ;)