cache compatible mode broken?

Hi, I posted also on the blog and here’s my problem:

Hi,
I tried to install and make SAM run on my site. If I let it run in PHP mode, all is fine… but since I have a caching plugin, I need to let it run in js mode. Here I have trouble: I get the error 403 forbidden all the time and the widget does not display.
The console log I have, is the following(caching and minification disabled):

POST http://www.diariodavancouver.com/wordpress/wp-content/plugins/simple-ads-manager/sam-ajax-loader.php 403 (Forbidden) jquery.js?ver=1.10.2:5

sendjquery.js?ver=1.10.2:5

x.extend.ajaxjquery.js?ver=1.10.2:5

(anonymous function)sam-layout.min.js?ver=2.2.80:1

x.extend.eachjquery.js?ver=1.10.2:3

x.fn.x.eachjquery.js?ver=1.10.2:3

(anonymous function)sam-layout.min.js?ver=2.2.80:1

cjquery.js?ver=1.10.2:3

p.fireWithjquery.js?ver=1.10.2:3

x.extend.readyjquery.js?ver=1.10.2:3

q

I’m using WP super cache and BWP minify, but I get the same error even though I disable them both. The only way I can make it work is with SAM in PHP mode but because of the caching it’s not working properly (always displaying the same ad..)

Here’s my data:
Wordpress Version: 3.7.1
SAM Version: 2.2.80
SAM DB Version: 2.6
PHP Version: 5.3.28
MySQL Version: 5.5.34-log
Memory Limit: 256M

Any suggestion? Thank you!

http://wordpress.org/plugins/simple-ads-manager/