pacific bonus withdraw

ok the free roll when u deposit and withdraw of 400 gets u 100 dollars in bonus money. when i went up to 150, i withdrew 50 and it is waiting. Assuming i go up again from 100 to 150 the next day, can i withdraw another 50 or do i have to wait for the other 50 to be processed first. i think i got rejected when cashing out after i cashed out the day b4 because it wasn't processed yet.