Create in your psyBNC home following file:

./psybnc/scripts/
Name: USERnn.SCRIPT
"nn" set the personal account number.

Paste the code in the file.

CODE

--
server JOIN *!*@* #yourchannel * echo "MODE #f-ws +v $NICK"
--

Afterwards make a /SRELOAD on the psyBNC to install and activate the script.