trouble rewiting path

when CLIENT_ACCEPTED {
  set hsl [HSL::open -proto UDP -pool graylog2-syslog-pool]
}

when HTTP_REQUEST {
  create variable to hold modified path, split on ;jsessionid
  set nojsession [getfield [HTTP::path] ";jsessionid=" 1]
   Check if the path contains a jsessionid
  if {[HTTP::path] contains ";jsessionid"}{
      write to log verify that the if clause and the variable are correct
     HSL::send $hsl "webmod This is the $nojsession without sessionid"
      replace the path with the variable (modified path without jsessionid)
     HTTP::path $nojsession
  }
}