Hi Arvind,
EVENT based scheduling works based on the BP_RAISE_EVENT FM.
I guess you had written logic in your program to trigger the event based on this FM ...
Next inorder to trigger your process chain periodically you need to also schedule the program by creating a job and inser the program and event name in it so that it will trigger the event that you are using in your Process chain.
Sm36 --> create a job --> next enter the program(event triggering program) and varaint --> save it and schedule the job ... when ever the job is scheduled it will trigger the event that you had set in the job . next it will trigger the process chain .
Regards
KP