Querying server

Im trying to query a HL2 master server that contains the list of servers.

Here is the protocol: http://developer.valvesoftware.com/wiki/Master_Server_Query_Protocol

and here is my code

SuperStrict

Framework brl.blitz
Import brl.retro
Import brl.socket

Global Socket:TSocket=CreateUDPSocket()
Global Stream:TStream=CreateSocketStream(Socket)
BindSocket(Socket,0)
ConnectSocket(Socket,DotToIntIP("69.28.151.162:"),27011)

WriteByte(Stream,$31)
WriteByte(Stream,$00)

WriteByte(Stream,Asc("0"))
WriteByte(Stream,Asc("."))
WriteByte(Stream,Asc("0"))
WriteByte(Stream,Asc("."))
WriteByte(Stream,Asc("0"))
WriteByte(Stream,Asc("."))
WriteByte(Stream,Asc("0"))
WriteByte(Stream,Asc(":"))
WriteByte(Stream,$00)

WriteByte(Stream,Asc(""))
WriteByte(Stream,Asc("g"))
WriteByte(Stream,Asc("a"))
WriteByte(Stream,Asc("m"))
WriteByte(Stream,Asc("e"))
WriteByte(Stream,Asc("d"))
WriteByte(Stream,Asc("i"))
WriteByte(Stream,Asc("r"))
WriteByte(Stream,Asc(""))
WriteByte(Stream,Asc("c"))
WriteByte(Stream,Asc("s"))
WriteByte(Stream,Asc("t"))
WriteByte(Stream,Asc("r"))
WriteByte(Stream,Asc("i"))
WriteByte(Stream,Asc("k"))
WriteByte(Stream,Asc("e"))
WriteByte(Stream,$00)

Repeat
	ReadByte(Stream)
Until SocketReadAvail(Socket)<=0
CloseSocket(Socket)
End

Function DotToIntIP:Int(IP:String)
	Local off1:Int=Instr(ip$,".")
	Local ip1:String=Left$(ip$,off1-1)
	Local off2:Int=Instr(ip$,".",off1+1)
	Local ip2:String=Mid$(ip$,off1+1,off2-off1-1)
	Local off3:Int=Instr(ip$,".",off2+1)
	Local ip3:String=Mid$(ip$,off2+1,off3-off2-1)
	Local off4:Int=Instr(ip$," ",off3+1)
	Local ip4:String=Mid$(ip$,off3+1,off4-off3-1)
	Return Int(ip1) Shl 24 + Int(ip2) Shl 16 + Int(ip3) Shl 8 + Int(ip4)
End Function

Now, I know the server replies, SocketReadAvail returns I think 1428 for me but when I try to read, with ReadByte I get "Error reading from stream."

Can anyone help me?