under kde kppp freeze when used
 

i have this problem with my kppp. when i drag and drop kppp links from kde menu to a child panel and then execute it from the child panel by clicking it will freeze the panel including kicker.
when i drag and drop links from kde menu to make a link to kppp on my desktop and then execute it from there, desktop will also freeze until i terminate kppp. kppp is running fine. sometime when kppp is on and connected i cant use shortcut key custom defined by myself. if i do use the shortcut key my keyboard will also freeze. it refuse to work until i close kppp.

how to solve this problem.
is it a bug or what?