DAoC with two monitors

I'm having a slight problem with DAoC. I'm running two accounts with two different monitors. It's been happening more and more frequently, but when I click over to the second display and the accounts swap monitors, my main one goes black. I can still play, but that display region for my main account is completely blacked out. The only way I've been able to get it to show back up is by logging out of the game. Once I get to the character selection screen, i'm able to see the region again.