WMP 12 won't play str sub

Ok, here is the problem.

This is when there is no sub (str) within the same folder as the vid


But when i put in the str file in the same folder, this happened


How can i fix this?
Thank you.

it works fine with the window media 10 on my old laptop....so i don't think it is the player's fault.
WMP 12 works fine with anime with sub encoded into the video, but doesn't when you have an external str file

yeah it works.... thanks!
but i'm still curious to what causes the problem.