What's With the Beta Version?

Eversince i downloaded the Beta Version of Yahoo Messenger, i get kicked out for no apparrent reason...it happens everytime i close a dialogue box...why is this so? please tell me...i am desperate...i don't wanna go back to the previous version...i find their Beta Version really cool, especially the computer to computer call...it's loud and clear and yeah it's for free...no need for overseas calls :=)