Time to time, deploy mashup from Mashup Composer will fail. When you check the activity log in Mashup Manager , you will see have set to "Session expired, please log in again" error message, even you deploy within the timeout minutes.
see WebWare gsoap ISAPI module documentation." Check that your datasource is correctly defined in your Mashupmgr -ds.xml in the deploy directory. Example of SQLServer snippet - replace the italics as appropriate
