This will probably be so easy I will kick myself over the entire weekend, but here goes.

I have a sub routine which returns a HASH reference to a data structure as follows

$myhash{$key}->($value1, $value2)

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In the calling program I can dereference the hash no problem.
foreach $key (%$ref){
    ($value1, $value2)= @$ref{$key}
    ##do something...
}

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However when I pass the same $ref to a sub routine 
mysub($ref);

sub mysub{
    my $param = (@_);

    foreach $key (%$param){
        ($value1, $value2)= @$param{$key}
        ##do something...
    }
}

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Does not work. Where am I going wrong? Thanks.

Updated for Tomte, yes it was a typo in the posting sorry!

In reply to A dereferencing problem by Scarborough

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