use Class::Struct;


struct MyStruct => {
    hash1 => '%',
};

#fill the struct's hash with some data
my $test = MyStruct->new(
                         hash1=>{one=>onesdata}
                       );

use_hash(\$test);

while(($key,$val) = each %{$test->hash1}){
		print "$key=$val\n";
}

sub use_hash{
    my $ref = shift;  #obtain the passed in reference
    $$ref->hash1{two} = 'twosdata';  #PROBLEM
}