Lua String split params problem on TFS 1.0

[Guiaki]

I have been trying to use split in talkaction parameters but it don't work, here are what I have tried:
string.explode(param, ",")
That is the inicial issue, it gives an error, so I changed to:
param:split(",")
as sugested by @Ninja but it didn't worked, I also tried:
string.split(param, ", ")
and finally
split(param, ", ")

What Iam trying to do in order to test it is:
doPlayerPopupFYI(cid, "First Param: "..t[1].." and second: "..t[2])

just reminding, all of those lines previously shown are returning their value to t (t=string.expode)

Any idea?

 

[Guiaki]

Very stupid mistake of myself, I forgot to add separator=" " at talkactions.xml