Adding signal to a station

Hi!

I want to add a signal that I want to use for a worldzone.
When I add the DO signal in the I/O System and restart the controller I cant use the signal since I get the message that it is “not found”.
Can anyone help me finding where I go wrong?
I am working with a completely new station with only one irb 1200 in it!

Best regards Kristoffer

What signals show up when you view the list of DO’s? Is it possible that there is simply a typo?