Help! I am trying to play ultima 8 - pagan. i have the game on C:/oldgames/

i made all the steps vor dosbox till i have to put in cd ultima8pagan.
it says:
C:/> cd ultima8pagan
Unable to change to: ultima8pagan.

what shall i do? please if you speak german or italian, please write in one of this to language, and please not to complicated, i am a real noob.
thank you!
tommasi