why wont my flash game work?

[oohmygod831]

ive made a game using flash mx 2004 professional and ive inserted it into a page in my website. the site is only running from a disk at the minute as its for a college project. when i view the site from my home pc it works fine and the game can be played ok bu t when i get to college and try the same thing i get an error message saying that the javascript is making the machine run slow and i should abort. the flash file is 989kb and below is the script ive inserted into the file ( the game is basically a memory game where you match up pairs of cards to reveal a picture underneath)

fadeout = function()
{
this._alpha-=5;
if (this._alpha <= 0)
{
delete this.onEnterFrame;
}
}

fadein = function()
{
this._alpha+=5;
if (this._alpha >= 100)
{
delete this.onEnterFrame;
}
}

moves = 0;
for (var i = 0; i < 20; i++)
{
this["card" + i].gotoAndStop((i % 10) + 1);
this["card" + i].onRelease = function()
{
if (secondCard != undefined)
{
secondCard.covering.onEnterFrame = fadein;
firstCard.covering.onEnterFrame = fadein;

delete secondCard;
delete firstCard;
}

if (firstCard == undefined)
{
firstCard = this;
this.covering.onEnterFrame = fadeout;
}
else if (firstCard != this)
{
moves++;
score_txt.text = moves;
if (this._currentframe == firstCard._currentframe)
{
firstCard.onEnterFrame = fadeout;
this.onEnterFrame = fadeout;
delete firstCard.onRelease;
delete this.onRelease;
delete firstCard;
}
else
{
this.covering.onEnterFrame = fadeout;
secondCard = this;
}
}
}
}

shuffle = function()
{
for (var i = 0; i < 100; i++)
{
var c1 = random(20);
var c2 = (c1 + random(19)) % 20;

var tx = this["card" + c1]._x;
var ty = this["card" + c1]._y;

this["card" + c1]._x = this["card" + c2]._x;
this["card" + c1]._y = this["card" + c2]._y;

this["card" + c2]._x = tx;
this["card" + c2]._y = ty;

}
}
shuffle();

also when i try to view the flash file at college , it says that my flash file is an unexpected format? college uses flash mx 2004 (but its an educational version i think)

please help

[OurNation]

Im assumming the computers are all conected server like and if your program takes up to much memory it messes things up.