Well, the first thing wrong is you're initializing your hash with a HASHREF, not a hash. You might want to define the hash like this:

my %HoA=(
         1=>["ab",20090101,91010],
         2=>["cd",20090101,91010],
         3=>["ef",20090201,101000],
      ......
         );
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Remember, hashes are initialized as lists; you could just as easily say

my %HoA = ( 1, [...], 2, [...], 3, [...], ... );
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The initialization in your example, however, is effectively the following:

my %HoA = ( {...}, undef );
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Your hash has one key--a reference to the data structure you built--and no values.

With that one change, the code runs, and that appears to be the meat of your question.