Problems with SXMB_IFR, I can't start the Integration Builder

Hello,

As I run the transaction SXMB_IFR, the integration builder doesn't open in the browser. It opens an windows explorer in the C:\Documents and Settings\MyUSER\SapWorkDir where there are 2 files SAPHistoryMyUSER.ldb and .mdb

I have the SAP NW BAP Trial just installed, should I add something more ?

Does anyone could indicate me where to look (e.g. log files), as I'm quite new to SAP.

Just to let you know, my global goal is to implement an XI-CNT (to be certified) for exchanging information with a third party system that is able to do XML via HTTP, something I understood to be clearly in the field for XI, doesn't ?

Thanks in advance for your answers!

Cheers,

greg