problem with loading data from text file into an array????

[Dr_flash]

hi all,

the code is about loading data from text file named:"data.txt"

the data in the file are as following:
&a1=1&
&a2=2&
&a3=3&
&a4=4&

now in the flash file:

in the first frame on stage, code: loadVariables("data.txt", "_root");

then in a button on stage, the code:
on (press) {
_global.arrayData = new Array();
for (var i = 1; i<=4; i++) {
var temp = eval("a"+i);
arrayData[i] = temp;
trace(arrayData[i]);
}
}



in the trace panel, the result is:
undefined
undefined
undefined
undefined


any help with that?