Whats missing from a style when i cant edit the title through the forumdisplay?

[VBUsers]

You know how most styles will let you edit the title of a thread just by 2 left clicks on the thread it self? well my style doesnt allow that and i want to know whats missing so i can make it do that.

[Lynne]

I believe it's an ajax function. Do you have ajax enabled on your forums?