<HTTP_REQUEST> - Operation not supported. Multiple redirect/respond invocations not allowed (line 5) invoked from within "HTTP::respond 200

when CLIENT_ACCEPTED {
    set hsl [HSL::open -proto UDP -pool xyz-pool]
}   
when HTTP_REQUEST {
 if { [HTTP::uri] starts_with "/testme" } {
  HSL::send $hsl "MyTest [IP::local_addr] [HTTP::uri]"
  return
  }
 else {
  HTTP::respond 200 content "Something" noserver Content-Type "text/html" Connection "Close"
  }
}