Try this

Code:
 on *:TEXT:!rosters add *:?: {
  if ($level($nick) >= 100) {
    if ($read(Scripts\txts\Rosters.txt, w, $3-)) {
      msg $nick 14«15«0«4 $3- is already a roster! 0»15»14»
    }
    else {
      write Scripts\txts\Rosters.txt $3-
      msg #nLegends 14«15«0« Added4 $3- to the rosters. 0»15»14»
      msg $nick 14«15«0« Added4 $3- to the rosters. 0»15»14»
    }
  }
  else msg $nick 14«15«0«  Access Denied 70»15»14»
}