How do I set my forum profile's title?

[thokling]

Sadly, although I have a User CP in the forums, and it indeed includes an "Edit Profile" command on the left hand side of the page, the option allowing me to change my user title does not exist. The Edit Profile page is set up as follows:

(Left panel)
Required Fields
Optional Fields
Additional Information

(Right panel)
Additional Contact Information
Away Information

As noted, in case it's of use, the main site allows me to change my Custom Title. The setting, however, does not appear to transfer over to my forum profile.

HOW DO I CHANEG THIS ALREDY?!!1!?!/11/?!

I am disappointed thus far. I typically find this type of problem more frustrating.