Graal Error (npcserver?) and lagginess

[ZeLpH_MyStiK]

First problem:
Every now and then the npcs and even my staff rights stop working and I would have to reconnect to get it to work. Like the npc wont even respond, and even warpto or update level or anything else wont work. It seems to be a problem with the npcserver, i'm not sure.

Second problem:
I have a NVidia Riva TNT2 gfx card and it works for any other games, but when it comes to Graal it lags with lights on. Does anyone know a way to tweak it or something. Also when I'm on a level, I can only see other people flash across the screen. I have cable and a rather fast computer and it doesnt lag with any other game, so what's up with Graal? And once a player passes the level boundary, I see the player frozen at the boundary but they're actually way past that. I would have to walk to the other level to be able to see the player move. How can I fix these annoying problems?