[plt-scheme] plai-350.plt, DrScheme v370.2

I'm running DrScheme version 370.2-svn4jun2007 [3m].
I tried installing:
   http://www.cs.brown.edu/~sk/Publications/Books/ProgLangs/plai-350.plt
How should I fix the error below?

setup-plt: Setup version is 370.2 [3m]
setup-plt: Available variants: 3m
setup-plt: Main collection path is /usr/local/plt/collects
setup-plt: Collection search path is
setup-plt:   /Users/gknauth/Library/PLT Scheme/370.2/collects
setup-plt:   /usr/local/plt/collects
cannot install; version (300) of collection ("mzscheme") is required,  
but version (370) is installed

=== context ===
/usr/local/plt/collects/setup/unpack.ss:223:36
/usr/local/plt/collects/setup/unpack.ss:138:10