Multi Domain SSO between Portal and R/3 & BW

Hi,

My Portal domain is xxxx.net and my ECC domain is xxxx.com

I exported the portal certificate into ECC and created parameters in RZ10 to create & accept SSO tickets.

When i do the ECC System Connection tests in Portal, everything is good and successful. But when i run a Transaction iView, i get the ECC login screen.

Based on SAP Documentation, i modified UME Property as "ume.login.mdc.hosts = xxxx.com:8036", but still i get the ECC login screen in portal when i run a transaction iView. Please advice.

Thanks

Vijay