yahoo messenger beta won't let me login
 

I just upgraded to yahoo messenger beta and now when I try to log in it says that I am currently logged in on another computer or device and logs me back out. I spent an hour looking for a customer service email address but I can't find any way to contact them. I can't call the customer support number because I'm currently deployed to iraq. If anyone knows of a way to fix this or has their customer support email address it would be greatly appreciated.