How can I install expansion pack of my Dragon Age: Origins?

how can I install expansion pack of my Dragon Age: Origins? I have already installed DAO and finished the game but while trying to install the expansion pack it says Dragon Age is not installed in your computer, which already is.

PS: my both games are pirated version!How can I install expansion pack of my Dragon Age: Origins?
Most people who pirate games also pirate the dlc's for them. It is highly recommended that you use these together as they are extremely compatible and have been made to be used together by the original pirater.

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