wp-cache plugin question

Hello All
I installed wp-cache and it seems most of the plugin is working as it should, that is it displays a configuration page that looks reasonable.
At the top of the page is the following message:

Warning: GZIP compression is enabled in WordPress,
wp-cache will be bypassed until you disable gzip compression.
WP-Cache is Disabled

Can someone tell me where to find the gzip configuration files in Word Press?

Thank You
Pen Master