Looks like you need to reverse these two lines:

# the first time through the loop, $score has no value!
$sum = $sum + $score;
($name, $score) = split(/:/, $line);
[download]

like this:

($name, $score) = split(/:/, $line);
$sum = $sum + $score;
[download]

Jeff

R-R-R--R-R-R--R-R-R--R-R-R--R-R-R--
L-L--L-L--L-L--L-L--L-L--L-L--L-L--