He said: "We are very happy with the declaration of the player. But it does not depend on him, it depends on United.
"There is no issue with Ronaldo but they don't want to sell. The English club have to make the first step. United have the last word."
Real boss Bernd Schuster sparked a frenzy of speculation when he said Real would pay "whatever it takes" to land the 42-goal ace.
But Calderon has put paid to rumours a world-record £80m bid - dwarfing the previous record of £46m Real paid for Zinedine Zidane - was in the offing.