What to do?

Took 1/2 hour this morning to get game up and running -- it seemed to hang once; then got a disconnection notice; then a weird error about file access. went back to Negilahn and played around with the buttons and switches again.

The light outside stays on indefinitely, until you start pressing the sound buttons; then the light goes off in a minute or so. leaving the light on for a while, one of the windows reveals a large two-legged creature visible among the trees.

That's it; what to do? is this another collaborative puzzle? a timed puzzle requiring pressing buttons within a given amount of time? and what happens when you do? presumably you emerge from the chamber, out into jungle. or perhaps the square plate on the lower level, with a d'ni numerical symbol on it, opens and gives you access to other interior areas...