Call Target Prob

Hi,
I just formatted my pc and re installed GW but i just noticed that i cant call target with ctrl+space. It does work with Ctrl+click tho. I have checked the options but cant figure out how to make it work?
Anyone can help me pls. Ty.

Here's the Wiki link. http://wiki.guildwars.com/wiki/Target#How_to_target
You can find the controls there.