Posting problem

Sometimes, when I try posting something morethan 15 lines, not long lines, may be each with 100 chrs averagely, I get Page could not be displayed error and if I go back and click again on any link it displays FW-1 Protection Error Access denied...after I clear all temp files, cookies and history 3/4 times only I'll be able to post any thread...

I'll ask our system admins if anything has been happening on the servers. Size of text in a post should not impact pages being displayed. Server traffic and other issues might.

Brad!