I guess your code is really

while ($_myfile[$i] !~ /filename="(.*)\.(.*)"/)
{
   $args1=$1;
   $args2=$2;
   print $args2;
   $i++;
}
[download]

with the closing / on the regex?

The problem is that !~ means DON'T match. What you want is probably

while ($_myfile[$i] =~ /filename="(.*)\.(.*)"/)
{
   $args1=$1;
   $args2=$2;
   print $args2;
   $i++;
}
[download]

Hope this helps!
--
Mike