Ahh... I looked more closely at how you edited what I gave you... you don't need that isop line and it's formatted incorrectly as well as having 2 ban lines with one of them formatted incorrectly, which is the problem. Use this:

Code:
on @*:join:#: {
  if ($left($nick,-2) isalpha && $right($nick,2) isnum == $null) {
    ban -ku300 $chan $nick 2 14Spam Bot Detected
  }
}


You were trying to combine the on text and the on join into a single section, which didn't need to be done. All you had to do was use the on join section without the notice line.

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