Strange string from MEMO field in FireBird

Hi,

I new in PHP. I work with FireBird and I have query looks:
"select Y.Organizm as Nazwa, count(Y.ID) as LiczbaPrzypadkow, 
count(Y.Organizm) as DodatnichPrzypadkow, count(distinct Y.Pacjent) as 
LiczbaPacjentow, count(distinct Y.DodatniPacjent) as DodatnichPacjentow 
, list(distinct Y.DodatnieZlecenie) as DodatnieZlecenia from 
SelRaportIdentyfikacji('2008-11-01', '2008-11-30') Y left outer join 
Materialy M on M.ID = Y.Material left outer join Oddzialy O on O.ID = 
Y.Oddzial group by 1 order by 3 desc, 1"

and the result is something like that:
http://img509.imageshack.us/img509/5066/78994034sy1.jpg

when I double-click on the MEMO field I get window with ID:
http://img300.imageshack.us/img300/623/79032822pi4.jpg

it looks that everything is OK.

But when I write in php  echo $row['DODATNIEZLECENIA'] I got values like:
0x0000000c00000000, 0x0000001900000000, 0x0000001400000000, itp..

var_dump($row) gives:
array(8) { ["NAZWA"]=>  string(16) "Escherichia coli" 
["LICZBAPRZYPADKOW"]=>  int(42) ["DODATNICHPRZYPADKOW"]=>  int(42) 
["LICZBAPACJENTOW"]=>  int(41) ["DODATNICHPACJENTOW"]=>  int(41) 
["DODATNIEZLECENIA"]=>  string(18) "0x0000000c00000000" 
["NAZWAGRUPY1"]=>  string(14) "(nieokreślony)" ["NAZWAGRUPY2"]=> 
string(14) "(nieokreślony)" }

I don't know what I'm doing wrong. Why php didn't write correctly 
exactly this one field? Any help will be aprrecieated.

Kamil Walas.

P.S. Sorry for my English.