Problem with "eval" (Flash 5 in 6)

programming flash
1

I have a Actionscript in Flash5 here but that dosnt work on Flash6.
In output panel sey that is problem in “eval” command


eval("cont"+i)=0;
eval("cont"+i)=eval("contastat"+i)-minim;
eval("cont" + something)++;

How to work in Flash6
Can anyone help me with that ??