WP Super Cache and Simple Pie

Hi,
I have been using Simple Pie RSS reader on my website and everything was going great until I installed cforms, after cforms installation the web site loading got very slow then I decided to install wp super cache on my site and I did but now after wp super cache installation the feeds are not getting updated any more. Does anyone have a clue what the problem is or any of you guys have had such experience before?

Thank you all in advance.

P.S. The wp super cache has been properly installed.