How do you mean? Perhaps you did something wrong? Why don't you paste the code with it in?

This should normally work perfectly:
Code:
on @*:TEXT:*:#:{
 if $nick !isop $chan {
   inc -u5 $+(%,flood;,$address,;,$chan)

   if ( [ [ $+(%,flood;,$address,;,$chan) ] ] > 8) {

   shun $nick Flooding | timershun $+ $nick 1 240 unshun $nick
 }
}