I'm starting to work on the "Keyboard Layout Switcher" applet improvement so I need to install lxpanel myself.
I'm either on lubuntu 12.04 and 12.10, I download, compile and install successfully

./autogen.sh --prefix=/usr
./configure --prefix=/usr
sudo make install

but after running

lxpanelctl restart

the "Volume Control" applet disappears and when I readd it, it doesn't show up on the panel anyway.
Did anybody experience the same and can point me to the solution?
Thanks, regards,