[plt-scheme] Errors from Snooze Quick Start

[Henk Boom]

I just tried to follow the Quick Start at

http://planet.plt-scheme.org/package-source/untyped/snooze.plt/2/4/planet-docs/snooze/quick.html

When I try to run "mzscheme test.ss", I get the error:

test.ss:41:18: person: identifier for static struct-type information
cannot be used as an expression in: person

    Henk