I'm at charwood now and i need the key to the castle, where is that key ? And also my monk ac is only 17( monk lvl 9/rogue lvl 3), is that low ? how to increase my ac ?

hmm, im not totally sure what key your refering too, but... (um, i don't think its much of a Spoiler, so i wont mark it as one lol)
if you mean the key to get through the main gates then just convince the guard to open them (no key needed) and...
if you mean inside the castle then the key is in a chest (with a note id advise u read [img]smile.gif[/img] ) Hope this helps [img]smile.gif[/img]

As to your AC, um, your a monk so its not much of a surprise that you have a low AC (being as you probably dont have much armour [img]smile.gif[/img] ) but to get your AC up, just buy some AC raising items, such as a necklace of natural armour, or a ring/cloak of protection (but remember that some AC bonuses wont work together, so you cant wear a cloak of Protection and ring of Protection together and get both the bonuses, you just get the higher one). If this doesnt make much sense just read the manual, I think that explains it a bit better lol :D

What if someone happend to kill the troll and couldant get in the tower?

That troll isn't in Charwood, he guards Wanev's tower. If you killed that troll, search his remains for a wardstone or a key. That will let you lower the bridge. Look for a cave to enter the tower basement.

Go into one of the houses and talk to Mayor Mobley - he will tell you that the have some problems, but won't tell you exactly what they are. Then talk to the guard at the gate - he will open it.