sending data to cgi

I've been running a Perl cgi on a UNIX machine. The purpose of this cgi is
to download and parse data that the user has copy/pasted into a text window
on his or her web browser and POSTed to the cgi.

I've now moved my script to MacPerl and have found that it can no longer
handle data with more than about 30kb. Yet I'd like to allow users to send
me data between 100 and 500kb. It worked okay on UNIX/Apache, why can't it
work with MacPerl on a Macintosh?

Alternatively, I could try using the "ReadParse" feature of cgi-lib.pl

Is cgi-lib.pl available for MacPerl, and if so how might I use it? Anyone
had any experience with this?

cheers,

bp