SSO between the CRM 5.0 and ITS 6.20

Hi

Any one can u guid me how to configure SSO Between CRM 5.0 and ITS6.20 integrated R/3 4.7..

When I enter the Tr CRM_IC in CRM 5.0 System pop up the screen of Interaction Center Web Client on the life hand side R/3 Material Data if i click on it authentication page appears on screen with user id and password then page get the material data from R/3 through ITS System but my client want get material data without authentication i.e SSO (Single Sign On) without entering UID and Password.

Plese help me in this regards

Thanks

Kumar