sso using logon tickets

Hi,

We are using EP 6.0 sp2 and patch 39, and have to integrate it with sap's product SRM 5.0 with ITS 6.4 integrated with WAS 7.0

We have downloaded ep's verify.der file and uploaded the same in srm and have configure sso_accept_ticket to 1, but it still pops up the logon page for SRM with an error Single sign on not activated, kindly let me know if i've missed out on anything.

Thanks,

Swetha