The Dink Network

Ok, you know that snake on the pole in original Dink? Next to the abandoned mine? I attempted to duplicate it in my dmod and am now amazingly befuddled... I'm probably making some silly mistake , but here's what i have in the script for it:

sp_base_walk(&current_sprite, 80);

sp_speed(&current_sprite, 1);

sp_brain(&current_sprite, 16);

And it keeps turning into a table... which is really funny at first, but it gets rather annoying. Anybody wanna help the poor befuddled kitten?