I noticed that when you complete the Nalia Keep quest, you can get the option of trying to help her by enforcing her with back up or something like that. But she says that she needs a warrior and that because i'm not, she can't use me ... Do I need to be a specific class to get her to accept me as her warrior person? Or does she refuse anyway?

The rest of the keep quests are the Fighter Strong hold so to be able to acess them you need to be..
<UL TYPE=SQUARE>
<LI>A Fighter (duh)
<LI>A monk
<LI>A barberian (sp)
[/list]

what does (sp) mean? Fighter stronghold? where's that? ... is it part of Nalia's quest thingy?

The Fighter Stonghold is Nalia's Keep and the quests that go along with it.

(sp) means the spelling is uncertain.

Hmm I was a bit scant on the detail lol

As BTA said its the keep after you have sasved it from the trolls