Entity Framework

Question

Hi all ,

          I am facing problem in Entity Framework using stored procedure. mean i am creating stored procedure and then using it in entity framework  i am sure many of you saying that i am fool :) but it is a requirement , my problem is that when i add it to EF it create a complex class and it work fine, but when i alter it or add or remove parameter then it has to be modify & when i modify it sometimes it doesn't .. i don't know why so i delete it from EF and then Re-Add it , this solve my problem but this is not right way , so if somebody can help me out  this..... THANKS