recover / release nickname

[firestrife]

Hello,

It's my new account with github, I'm not sure if it's appropriate to post issues... The things is I'm trying to get my bot to recover/release nickname in case it was intentionally taken by someone else. Here's snippet of my codes, and it seem to hang then terminated itself.

on :error, 433 do
    open("errors.log", "a") do |log|
        log.puts curtime + " #{nick}: Nickname is already in use"
    end
    puts "#{nick}: Nickname is already in use"
    raw "PRIVMSG nickserv :recover username password"
    raw "PRIVMSG nickserv :release username password"
    raw "PRIVMSG nickserv :identify password"
end

Many thanks in advance and I couldn't have done this if it wasn't for isaac.