move to target buging out

ok i was doing a boat tour thing on a sim and used scripts to make it physicly move from 1 becon to an other
and it was way under the mass limit and worked fine yesterday and today it bugs out the boat falls into the water and just craps out

duno wats wrong can any1 help if u nee dil paste the script

hard to diagnose script problems without seeing the script, post it and i'll see what i can do =)

vector firstbeacon=<31.43279, 67.92267, 20.200>;
vector nexbecon;
float time;

integer on=0;
integer listening=1;

default
{
state_entry()
{
llListen(0,"","","cruise";
llListen(10,"","","";
llListen(110,"end becon","","end";
llSetStatus(STATUS_ROTATE_Z, FALSE);
llSetStatus(STATUS_ROTATE_X, FALSE);
llSetStatus(STATUS_ROTATE_Y, TRUE);
llSetStatus(STATUS_PHYSICS, FALSE);
llSetBuoyancy(1.0);
llStopLookAt();
}
on_rez(integer param)
{
llResetScript();
}
listen (integer channel, string name, key id, string msg)
{
if(listening==0)return;
if(channel==0)
{
on=1;
llSetStatus(STATUS_ROTATE_Z, FALSE);
llSetStatus(STATUS_ROTATE_X, FALSE);
llSetStatus(STATUS_ROTATE_Y, TRUE);
llSetStatus(STATUS_PHYSICS, TRUE);
llSetBuoyancy(1.0);
llWhisper(0,"starting cruise all abord";
llMoveToTarget(firstbeacon,2);
//llLookAt(nexbecon,0.6,1);
llSetTimerEvent(1);
listening=0;
}
else if(channel==10)
{
time=(float)llGetSubString(msg,0,4);
nexbecon=(vector)llGetSubString(msg,6,llStringLength(msg));
llMoveToTarget(nexbecon,time);
llLookAt(nexbecon,0.6,1);
listening=0;
llSetTimerEvent(1);
}
else
{
on=0;
llStopLookAt();
llSetStatus(STATUS_PHYSICS, FALSE);
llWhisper(0,"cruise over pls disembark";
llResetScript();
}
}
timer()
{
llSetBuoyancy(1.0);
listening=1;
llMoveToTarget(nexbecon,time);
llSetTimerEvent(0);
}
}

thing is it worked fine the other day and now it just sinks...

--cringes upon seeing the llListen(0...)--

Just a friendly word...please NEVER...EVER...make a script listen on the public chat channel Private channels work just as well and with MUCH less lag-causing consequence.

not if u want the public use it
duh
and thats just a test