PostgreSQL 7.3.3 on Windows 2000

Hi!

I don't want to use PostgreSQL "the Unix way" on Windows and so I did not
install the Cygwin and tried to compile using Microsoft Visual C++ 6.0.

Unfortunately, I encounter the following error when execute psql on Windows
2000,

  psql: could not create socket: Address family not supported
(0x0000273F/10047)


Do you have any idea of what could be the problem?