how to get/select custom properties...

[dimusZ]

I have added new property for Document Library
i able to search on this property, but i can't get the value of that property
i search in such case:
SELECT "urn:schemas.microsoft.com:fulltextqueryinfo:Title",
"urn:schemas-microsoft-comfficeffice#ows_MY_COLUMN"
FROM ( TABLE Portal_Content..Scope() UNION ALL TABLE Non_Portal_Content..Scope() )
WHERE contains("urn:schemas-microsoft-comfficeffice#ows_MY_COLUMN", 'example')

"SELECT" is working (with WHERE conditions and return smth) but
return for "urn:schemas-microsoft-comfficeffice#ows_MY_COLUMN" is empty

Can anybody help?