Acess to teamviewer server has been denied

[lintran]

Hi all, Im using Macbook Pro Retina 13'' and Yosemite 10.10. I cant not make teamviewer 10 (or 9..) working. Anytime when i turn it on, i only get an pop up with msg: "Acess to teamviewer server has been denied"
In windows system, i know there are many ways to fix it, clear registry, change NIC address... but in OS X, i really dont know how to fix this prolem and dont know what is teamview check in OS X (exam serial number, NIC address...)
So please anyone tell me the way to get me out of this problem
Thank you so much.