I am sure you didn't install it correctly then. Just open the console (press tilde key "~") and type this "tpt.getscript(1, "autorun.lua", 1) " without the quotes and it's as simple as that. I would recommend doing it with a fresh copy of tpt because there might be a script interfering with it (the chances are pretty low though.)
Alternatively, you can also try using a mod, for example, Cracker1000's mod which comes with script manager and tptmp both preinstalled.