Float is turned into a NaN within timerevent function?

programming flash
1

:link:Hi,

Hi im having some problems pushing the two vars below into a timerupdate function while trying to stop them turning into NANs.

vx=2.3;
vy=1.3;

//they are declared private

Im passing 2 floats(vx, vy) into a class, then running a function called

update(e:TimerEvent){
trace("Update:",this.x,  this.y  ,vx, vy, );
this.x+=vx;
this.y+=vy
}

Right away in the trace within update, trace(“Update:”,this.x, this.y ,vx, vy, ); what happens is the output shows me the vx and vy have become NAN like so

Trace 1st pass: Update: 0 0 NaN NaN
Trace 2st pass: Update: -107374182.4 -107374182.4 NaN NaN

Any ideas this seems like a very wierd bug, the vars are all set up properly IMO.