Strange problem with palying Flac files in WMP 11

Hello I have a problem with playing flac files, Each time I want to play any flac files my WMP 11 won't recognize it, so I have to go and Uninstall the Directshow filter and reinstall it again. right after installation my WMP is ok with Flac files but if I restart my computer again the same problem happen! My WMP 11 wont recognize the codec and the direct show filter so it can not play flac files again. Please help.