it changed with the new version i guess 0.0
from "heroes of horror" (d&d 3.5 class book)
"Advanced Learning (Ex): At 4th level, a dread necromancer
can add a new spell to her list, representing the result
of personal study and experimentation. The spell must be
a cleric or wizard spell of the necromancy school, and of a
level no higher than that of the highest-level spell the dread
necromancer already knows. Once a new spell is selected,
it is added to that dread necromancer’s spell list and can be
cast just like any other spell she knows. If a spell is both a
cleric spell and a wizard spell, use the lower of the two spell
levels (when different) to determine what level the spell is
for a dread necromancer.
A dread necromancer gains an additional new spell at 8th,
12th, 16th, and 20th level.
"
along with first level spell list: "DREAD NECROMANCER SPELL LIST
The dread necromancer’s spell list appears below.
1st Level: Bane, bestow wound*, cause fear, chill touch, detect
magic, detect undead, doom, hide from undead, infl ict light wounds,
ray of enfeeblement, summon undead I*, undetectable alignment"
after checking, those are the exat (a part from detect magic) spells i get as level one 0.0
Soooo the class is implemented now in faithful way to the way WotC made it(rule book) !!!
In your case, try leveling to fourth level and see, if you get the dialogue window; if you do, everything's working fine, if not ... well now we can start guessing if the bug comes from the server or your version :3
just my 2 cents !!