Karsten,
I get:
You don't have permission to access /~jimm/projects/squeak_postgresql/Jim-PostgreSQL-Test.st on this server.
and
You don't have permission to access /~jimm/projects/squeak_postgresql/Jim-PostgreSQL-Config.st on this server.
Fixed. Thanks for reporting this problem. I tend to be a bit paranoid about file permissions on that server, since it's an ISP's machine and I'm just one of many users.
Jim