It looks like Aerolineas is indeed moving flights to AEP. From the story it seems they are moving a whole lot of flights there:
Aerolineas to move 160 weekly flights from Ezeiza to Aeroparque
DATE:19/02/10
SOURCE:Air Transport Intelligence news
Aerolineas Argentinas has set a 14 March move date for transitioning regional international flights from Ezeiza Airport outside Buenos Aires to Aeroparque in the city centre.
http://www.flightglobal.com/articles...ezeiza-to.html