W3 Total Cache Compression problem

HI There

Ran my site through Google Page speed and it came up with the following compression problems. I have gzip enabled in browser cache, is there something that I have missed to be getting this result?

Compressing the following resources with gzip could reduce their transfer size by 100.9KiB (67% reduction).
Compressing https://www.jedmaxseeds.com.au/wp-includes/js/jquery/jquery.js?ver=1.4.4 could save 50.3KiB (65% reduction).
Compressing https://www.jedmaxseeds.com.au/wp-content/plugins/wp-e-commerce/wpsc-core/js/wp-e-commerce.js?ver=3.8… could save 19.1KiB (71% reduction).
Compressing https://www.jedmaxseeds.com.au/wp-content/plugins/wp-e-commerce/wpsc-core/js/user.js?ver=3.8.3382573 could save 10.8KiB (75% reduction).
Compressing https://www.jedmaxseeds.com.au/wp-content/plugins/wp-e-commerce/wpsc-core/js/thickbox.js?ver=Instinct… could save 9.8KiB (69% reduction).
Compressing https://www.jedmaxseeds.com.au/wp-content/plugins/wp-e-commerce/wpsc-admin/js/jquery.livequery.js?ver… could save 4.5KiB (67% reduction).
Compressing https://www.jedmaxseeds.com.au/wp-content/plugins/wp-e-commerce/wpsc-core/js/jquery.rating.js?ver=3.8… could save 3.2KiB (68% reduction).
Compressing https://www.jedmaxseeds.com.au/wp-content/plugins/wp-e-commerce/wpsc-core/js/ajax.js?ver=3.8.3.382573 could save 1.3KiB (48% reduction).
Compressing https://www.jedmaxseeds.com.au/wp-content/plugins/wp-e-commerce/wpsc-core/js/jquery.infieldlabel.min…. could save 1.1KiB (63% reduction).
Compressing https://www.jedmaxseeds.com.au/index.php?wpsc_user_dynamic_js=true&ver=3.8.3.382573 could save 632B (60% reduction).
Compressing https://www.jedmaxseeds.com.au/wp-includes/js/comment-reply.js?ver=20090102 could save 374B (47% reduction).