If the interface says 4.0.1 then you're not running the latest scripts; there was a fix for multiple schedules in 4.0.5. Download the scripts and make sure you copy them to <docroot>/webinator, where <docroot> is your web server's document root. Your admin interface will say Webinator 4.1 if you have the latest scripts.
I checked the dowalk and webinatoradmin scripts they both were version 4.0.5. i have downloaded the 4.1.1 scripts and compiled the dowalk the admin interface still says 4.0.1 , do i need to do reinstall 4.1 webinator? please advice.
Thanks for your help