Script for a novelty cannon

I'm having trouble writing a script that will "launch" (push) the avatar when touching the cannon. This is what I have right now (incomplete, and poorly done, its my first script though)

default
{
touch_start(integer total_number)
{
integer local = FALSE;
vector angular_impulse = <1,1,1>;
vector impulse = <10,10,10>;
key value = llGetPermissionsKey();
llPushObject(value, impulse, angular_impulse, local);
}
}

It doesn't even highlight the touch option when right clicked. I also need to include some method of positioning the character in the chamber, but I was going to research that after I sort this part out (any help on that would be awesome, though).

It looks ok to me, except value should be calculated as:

key value = llDetectedKey(0);

... so that it identifies the avatar who touched the cannon.

I built a similar thing once. I found I had to set the impulse vectors very high to propel the person any distance. Depends how big your cannon is, of course (stop sniggering).

Woo thanks much, it works now. It only seems to work for me, though. This is what I have for code:

default
{
state_entry()
{
llSay(0, "Hop your ass on in, then click anywhere on the cannon! It Fyuhn!";
}

touch(integer total_number)
{
integer local = FALSE;
vector angular_impulse = <1,1,1>;
vector impulse = <0,50,50>;
key value = llDetectedKey(0);
llPushObject(value, impulse, angular_impulse, local);
}
}

I'm thinking I need a loop? Or is there a break command that will restart the code for a new agent?

Sounds like you might be using it on land where pushing isn't allowed (you're still allowed to push yourself).