GetBattlefieldWinner() won't detect lose?

[Sylen]

Hi! I hope i can find some help here. I modified http://www.wowinterface.com/download...ting.html#info to my own preference. Since arena teams are gone now.
My code looks like this:

--Get old rating when player first login game
e = CreateFrame("Frame")
e:RegisterEvent("PLAYER_LOGIN")
e:SetScript("OnEvent", function()	
	old_rating1 = GetPersonalRatedInfo(1)	--2v2
	old_rating2 = GetPersonalRatedInfo(2)	--3v3
	old_rating3 = GetPersonalRatedInfo(3)	--5v5
	old_rating4 = GetPersonalRatedInfo(4)	--RBG			
end)

f = CreateFrame("Frame")
f:RegisterEvent("UPDATE_BATTLEFIELD_STATUS")	
f:SetScript("OnEvent", function()
	--make sure we're in an arena and not a battleground
	isUnratedArena, isRatedArena = IsActiveBattlefieldArena()
	if(isRatedArena) then
		--If the arena has not yet ended, return without doing anything
		battlefieldWinner = GetBattlefieldWinner()
		if (battlefieldWinner == nil) then
			return
		end

	--current ratings
	cur_rating1 = GetPersonalRatedInfo(1)	--2v2
	cur_rating2 = GetPersonalRatedInfo(2)	--3v3
	cur_rating3 = GetPersonalRatedInfo(3)	--5v5
	cur_rating4 = GetPersonalRatedInfo(4)	--RBG
		
	--calculate rating change
	dif_rating1 = cur_rating1 - old_rating1
	dif_rating2 = cur_rating1 - old_rating2
	dif_rating3 = cur_rating1 - old_rating3
	dif_rating4 = cur_rating1 - old_rating4
	end
	
	--get number of group members to make difference between arena bracket, rbg
	numGroupMembers = GetNumGroupMembers()
	
	--make message appear in chat
	if(old_rating1 ~= cur_rating1 and numGroupMembers == 2) then 
		ChatFrame1:AddMessage("[2v2] Aktuell: " .. cur_rating1 .. " | Alt: " .. old_rating1 .. " | Änderung: " .. dif_rating1 .. "",0,1,0)
	elseif(old_rating2 ~= cur_rating1 and numGroupMembers == 3) then
		ChatFrame1:AddMessage("[3v3] Aktuell: " .. cur_rating2 .. " | Alt: " .. old_rating2 .. " | Änderung: " .. dif_rating2 .. "",0,1,0)
	elseif(old_rating3 ~= cur_rating3 and numGroupMembers == 5) then
		ChatFrame1:AddMessage("[5v5] Aktuell: " .. cur_rating3 .. " | Alt: " .. old_rating3 .. " | Änderung: " .. dif_rating3 .. "",0,1,0)
	elseif(old_rating4 ~= cur_rating4 and numGroupMembers > 5) then
		ChatFrame1:AddMessage("[RBG] Aktuell: " .. cur_rating4 .. " | Alt: " .. old_rating4 .. " | Änderung: " .. dif_rating4 .. "",0,1,0)
	end
	
	--set current rating to old rating
	old_rating1 = cur_rating1
	old_rating2 = cur_rating2
	old_rating3 = cur_rating3
	old_rating4 = cur_rating4		
end)

Problems that currentliy occur:
- No chat message if my group loses arena match
- No chat message after RBG; i guess theres a problem with the "isRatedArena" check because we make sure its not a battleground.