Excecute sync 2 remote object methods....

[flexdaretolove]

I have a remote object, with 2 methods prepareCall and executeCall. 
In the mxml file I want to execute 

these methods in order, first prepareCall and secondly executeCall 
only after the prepareCall is finished.

Are these methods executed asyncron? even I have 
RemoteObject.prepareCall(); RemoteObject.executeCall() in a 
initialize event?

Is there a way I can execute them in order?

Thanks,

Vali