[PRIVMSG] user-type doesn't work

Its not because of the Regex but i wrote an Message Parser now :

    public static IrcMessage ParseIrcMessage(string rawMessage)
    {
        var prefix = "";
        var arguments = new Stack<string[]>();

        if (string.IsNullOrEmpty(rawMessage))
            throw new BadIrcMessageException("Message is empty.");

        var hasPrefix = rawMessage[0] == ':';
        if (hasPrefix)
            prefix = rawMessage.Substring(rawMessage.IndexOf(':'), rawMessage.IndexOf(' ', 1)).Replace(":", "").Trim();
        if(rawMessage.IndexOf(" :") != -1)
        {
            var trailing = rawMessage.Substring(0, rawMessage.IndexOf(" :"));
            var message = rawMessage.Substring(rawMessage.IndexOf(" :"));

            string[] argumentArray = new string[0];
            Array.Resize(ref argumentArray, trailing.Split().Length + 1);

            argumentArray.For((i) => {
                if ((i + 1) > trailing.Split().Count())
                    argumentArray[i] = message.Trim().Replace(":", "");
                else argumentArray[i] = trailing.Split()[i];
            });

            arguments.Push(argumentArray);
        } else {
            arguments.Push(rawMessage.Split());
        }

        var command = ((hasPrefix) ? arguments.Peek()[1] : arguments.Peek()[0]).Trim();
        return new IrcMessage(prefix, command, arguments.Pop(), hasPrefix);
    }

Now it work’s, thank you all for you’r help!