SSO between ECC system and Solution Manager 7.1

We have upgrade to Solution Manager 7.1 to implement the new release of Incident Management.

we would like to activate the single signon from ECC to Solution Manager.

In ECC we call Solution Manager standard service named "crm_ui_start" with path "/default_host/sap/bc/bsp/sap/" and is 

related to a standard BSP using the standard Function Module 'CALL_BROWSER', which has the URL as input parameter.

But when the standard service is called from ECC Solution Manager login screen appears requesting to input login credential of the destination system.

Can you provide the step by step process to activate the single signon between these two Netweaver components?

Thanks