Hi Omukawa, welcome to linuxquestions.org!
You probably forgot to add the wicd daemon to your startup scripts. Taken from slackbuilds.org:
Code:
You will need to start the wicd service at boot by adding the following
to your /etc/rc.d/rc.local:
if [ -x /etc/rc.d/rc.wicd ]; then
/etc/rc.d/rc.wicd start
fi
Just edit /etc/rc.d/rc.local with any text editor of your choice and make sure it's executable (chmod +x /etc/rc.d/rc.local), which it should be already.