Upgrading to SAP Business One 2007 - Step SBO-COMMON

Hi,

towards the end of this step I receive an error message that says 'Unable to connect to database; verify that database TCP/IP port service is started'.

Re to MS help and several postings on MS websites this means that the 'SQL Server Integration Services' should be started.

This is the case.

Could anyone give me a hint what also could have an influence?

Thanks Olaf.