You are right Kalypso. I confused IBL and IDL.

I used windforce few time, but when I made this bouncing bed:

http://www.sharecg.com/v/40278/View/5/3D-Model/Dynamic-matterss

I had problem with object between windforce and cloth. I was surprised then in PhilC tutorial windforce affect clothplane under ground prop. In my simulation this did not worked.

Do you have any prop between force field and dynamic cloth? Maybe P7 and PPro treat them different way.