SESSION_MANAGER access from BSP application

Hello there!!

We've developed a Customer Interaction Center Z BSP application, which is used as a customer location cockpit: It's been developed over a CRM system and it performs calls to several backend transactions via ITS (which are always opened in a new Internet Explorer window, meanwhile "central BSP window" (the cockpit one) keeps always opened)...

But we just can't reach backends SESSION_MANAGER transaction (SAP initial screen) because, when we type '/N' in backend's transaction bar, system closes Internet Explorer backend window!!

We've tried it following several ways but, unfortunately, we always reached the same outcome: BACKEND INTERNET EXPLORER WINDOWS IS CLOSED BY THE SYSTEM (only the BSP cockpit, the non-backend window, keeps opened)...

-No way by typing '/N' in navigation bar

-No way by calling a Z transaction which executes a report which calls SESSION_MANAGER transaction

-No way by using S000 transaction

-No way by using SAPMSYST report (dynpro 0040)

-...

Any help would be (kindly) appreciated.

Thanks in advance, greetings from Madrid.