demo

Can someone plz help me, I can't view any demo's.
When i go to etpro->replay and click a demo that i download or recorded, it started to load as normal, but when it finished loading i get back to the main menu again, and get message:
CL_readdemomessage: demomsglen>MAX_MSglen

I've allready deleted ET and installed it again but doesn't work, maybe someone here knows how to solve it?

ps hope you understand this poor english, sry for that ;)