Pure-ftpd max users trouble

[KeNt]

Code:

telnet host 21
Trying host...
Connected to host.
Escape character is '^]'.
421 1 users (the maximum) are already logged in, sorry
Connection closed by foreign host.

but pure-ftpd.conf have this

Code:

# Maximum number of simultaneous users
MaxClientsNumber 3
# Maximum number of sim clients with the same IP address
MaxClientsPerIP             15

pure-ftpd builded from source by howto from this forum
where is the bug?