celebrity actor is a writer and producer on a film I am working on , I am trying to submit and have been rejected, over and over

we don't want to announce in a trade yet but are making offers  to other cast and we want his writer and Producer credit up.  His manager asked me to put him up.  I shared the email where I was asked that by his established manager.  I have been using IMDB PRo for  25 years...  What do I do?