Good work.

# This line would discard the reference to %Fruits, and create a *new*
# hash with the specified values
# $Ref_to_Hash = { "Pears", 5, "Peaches", 7 };
[download]

The solution is to not change the reference, but the dereferenced hash:

%$Ref_to_Hash = ( "Pears", 5, "Peaches", 7 );
[download]