550: Permission Denied

i'm a student at a school and i'm trying to set up a FTP Server and me and my teacher (who has admin rights) can't figure out how to set it up. we keep on getting the same error over and over again. Basically we can't create or upload any files. But when i installed smartftp on my home computer i can upload. Any suggestions on wat i should do?

SmartFTP v1.5.990.11
Resolving host name "our server"
Connecting to 66.235.202.131 Port: 21
Connected to (our server).
220 host196 FTP server ready
USER (login name)
331 Password required for (login name).
PASS (hidden)
230 User (login name) logged in.
SYST
215 UNIX Type: L8
FEAT
211-Features:
MDTM
REST STREAM
SIZE
211 End
PWD
257 "/" is current directory.
TYPE I
200 Type set to I
PASV
227 Entering Passive Mode (66,235,202,131,32,15).
Opening data connection to 66.235.202.131 Port: 8207
LIST -aL
150 Opening ASCII mode data connection for file list
184 bytes transferred. (1.91 KB/s) (94 ms)
226 Transfer complete.
MKD asdf
550 Access is denied.
NOOP
200 NOOP command successful
NOOP
200 NOOP command successful
NOOP
200 NOOP command successful

Hi, that means that you don't have permisions to make folders on that path.

how to download?