LAN booking code doesn't work on TAM website
I am trying to check-in online for my TAM flight from GRU to EZE, but to no avail. The ticket was purchased through LAN.com but the LAN booking code doesn't seem to be working on the TAM website.
Is there a way around this? When trying to use the LAN site, I am being redirected to TAM.com so that doesn't work either.