[plt-scheme] Error msg on the new scheme...

I have a module (that was being used as a bash script) with the following statement in it...

#! /usr/local/bin/mzscheme
#lang mzscheme
;(provide (all-defined-out))
(define macs (with-input-from-file "macs.scm" read))

I am getting the error message: 

read: #reader expressions not currently enabled

I've looked through the documentation and have had trouble figuring out why it worked before but it isn't working now.  The provide statement is commented out because it was also giving me some grief.

Thanks for your time,

Dan