Are you set up in company 3 with a Person record? Or are you a Global User only? I'm not sure if this makes a difference but it's worth checking. CompaniesBlock is a global block, independent of the company number.
This is not the issue of upgrade SERP. But serverip.dat in this case contains the value: 192.168.88.12:1301, so this is local IP of the server with SERP.
Anyway I don't understand what do you me...
