Hello,
I recently received my H1B approval notice but letter also states that ," the petition has been approved for the classified requested. However the status previously accorded the worker had expired before this petition was filed. therefore the worker were out of status when this petition was filed. Thus the worker are not eligible for the requested change of status. Accordingly the request for change of status is denied. "
what does this mean ???

my Background
came to USA in F1 visa
student visa expired in 2013 but always had valid I20 (never out of status )
worked in OPT for 1 yrs.
My question
Can i still work at my petitioner
do i have to go back Nepal for stamping

Plz help