Cant run a secound rohan, it just suddenly crashes after i type the ID/PW

Anyone got a fix for this?any help appriciated

Try in order:

1: Restart pc then try running multi client Rohan
If that doesn't work:

2: Delete GameGuard Folder in c:\RohanUS - It will auto install when you load up Rohan so don't worry.
if that doesn't work:

3: Disable AntiVirus. If it works then double check your list of exceptions in the AV (Or, when it happened to me I had to change Antivirus). If it doesn't work, then you'll probably need to try a reinstall.

Good luck