Windowed Mode randomly stopped working

[Valdain]

I've had EQ set up to play in windowed mode for as long as this server has been around, but just a few minutes ago, my monitor went into rest mode. I woke it up and the window is gone. I enter full screen mode and its fine, but when i alt+enter again, the window disappears. i can highlight the window on my task bar and it shows nothing but black. really don't know what to do here as i've closed and reopened eq, restarted my computer, etc. nothing. any help would be great!

Thanks!

[Valdain]

It has been resolved by deleting my eqclient.ini