NetScheduleJobEnum API and WINXP

Does anybody know why i cann’t read my schedule tasks jobs in my WINXP
with vb6 and “NetScheduleJobEnum” api for my user acount (admin) , but can
read only jobs that made by vb6 and “NetScheduleJobEnum” api that mark as
“SYSTEM” creator ???

I’m dilling this problem a long time without any solution.

Thank you.