Array element to variable

Hello,

I have created an array by the following way:

 var config     = new Array();
 var ind : int = 0;
 sr = new File.OpenText(configPath);
     input = "";
     while (true)
     {
         input = sr.ReadLine();
         if (input == null) 
         {
             break;
         }
         config.Push(input);
     }

The array is filled with integers. How can I assign the value of the third element to a variable? I have tried the following way, but it gives me a "Cannot cast from source type to destination type." error.

 var volume : int = config[2];

Any ideas how should I do it?