scripting troubles

[cormanthor]

I am trying to get a script working, but I'm running into a couple of issues. The purpose of the script is to display my talent spec on my unit frame, and my target's (player only) spec on their unit frame. Example

Demonology
0/56/15

The data is good, and the format is right. But my issues are:

1) The script I have is not printing anything on my UF.
2) The script is printing my mouseover's spec on my target's UF

Any pointers, or is #2 "working as intended"?

text = ""
spec = ""
tree = ""
high = 0
if UnitIsUnit(uid, "player") then
    for i=1,GetNumTalentTabs() do
        name, _, points, _ = GetTalentTabInfo(i)
        if points > high then
            tree = name
            high = points
        end
        if i == 2 then
            spec = spec .. "/" .. points .. "/"
        else
            spec = spec .. points
        end
    end 
elseif UnitIsPlayer(uid) then
    for i=1,GetNumTalentTabs(true) do
        name, _, points, _ = GetTalentTabInfo(i,true)
        if points > high then
            tree = name
            high = points
        end
        if i == 2 then
            spec = spec .. "/" .. points .. "/"
        else
            spec = spec .. points
        end
    end 
end
text = tree .. "\n" .. spec