The database <Database name> could not be accessed. In order to access this database, check your network connection and verify that your database server is available. It may be necessary to disable any firewall software...
Condition: Windows 7 -64bit acting as sharing server. Client station: Windows Vista 32bit. (Reversing Client/Server roles for both platforms seems to have the same problem) So not a platform matter.
According to the solution source, and comments/reports online, it would seem that the solutions are circumstantial.
In my case, the solution has to do with Host name cannot be read. So change to IP address instead.
Solution:
In the hosting PAD file, change HOST="MOTI-PC" to HOST="192.168.166.101".
Took me more than 3 hours to resolve this. Submitted to the long steps on the site, tried multiple methods to solve the problem. I can't believe it took me to the last method to solve it.