sound.PlayURL acting wonky

[KarmaLord]

Been playing around with sound.PlayURL to see what it can do. For some reason the callback function returns nil in most cases.

if SERVER then
	concommand.Add("play_stream",function(ply,cmd,args)
		local stream = args[1]
		umsg.Start("play_stream",ply)
			umsg.String(stream)
		umsg.End()
	end)
elseif CLIENT then
	local chanNum = 0
	Channels = {}
	usermessage.Hook("play_stream",function(data)
		local stream = data:ReadString()
		sound.PlayURL(stream,"play",SetStream)
	end)
	
	function SetStream(chan)
		print("RanSetStream")
		print(chan)
		chanNum = chanNum + 1
		print(chanNum)
		Channels[chanNum] = chan
		PrintTable(Channels)
	end
end

print(chan) in SetStream returns nil unless I spam the play_stream command, which them makes it wait a second and actually gets the userdata of the stream.

Regular play_stream:
[IMG]http://puu.sh/3pVc8.png[/IMG]

Spammed play_stream:
[IMG]http://puu.sh/3pVf9.png[/IMG]

It plays the stream all fine and dandy (and when spammed, it plays it a shitton), but I'm trying to make a way to close the stream as well. Anyone got a clue as to whats up, or is it broken?

[Wizard of Ass]

Apparently garry is doing something wrong when creating the userdata.