DataSet of SSRS is not showing Fields

Hi.

 I am currently working With SSRS . I have created a Store Procedure To show Data from different table in my Database,I have Used a temp table with #xxx Name,when i am creating DataSet  for this Store procedure . but its not Showing the Fields of Store Procedure, but when i create other  Store procedure without temp table with #xxx  then its showing the fields in Data Set.

 What Could be the possible Reason,

Thanks