Since I pretty much installed the 4.0.11 version before it was posted on the site I decided to update to it manually. needless to say there are some problems. mainly it goes like this here, everytime.
This just happend when I downloaded 4.0.11 and try to upgrade on a licensed server. It copied my serial number and license key in the install directory and I even done it twice myself to try but same problem.
Contacting licensing server ...
[ERROR] Sorry, installation will abort without a valid license key.
For evaluation purpose, please obtain a trial license key from our web
site http://www.litespeedtech.com, copy it to this directory
and run Installer again.
If a production license has been purchased, please copy the serial number
from your confirmation email to this directory and run Installer again.
Please remember to set ftp to BINARY mode when you ftp trial.key from
mailed you the info. Install process fails on every server and today one of my servers, it just deleted my license key and stopped. i tried to install latest version using trial key, it would not even finish the install process.