tribes ascend from steam has been having some trouble establishing a connection between the authentication and update service for tribes ascend. here is what i did to fix the problem! NOTE: this problem has hundreds of fixes these are just the few that worked for me and are the most common! enjoy!
Problems: Microsoft .net framework steam drivers (Video and Audio) installation failure
These were all my problems. If these didn't help I am sorry there's not much I can do. ENJOY! =]