Accessing custom java classes in Coldfusion

[Khinu]

I have created some java classes (.class) to work as a model
in CF. I could instantiate this classes through the CreateObject()
function in CF but I was unable to reach them from Flex, I mean
when I use the [RemoteClass(alias="javapackage.javaclass")] to
create a mapping in Flex. When I try to send a Flex instance of
this class it’s throwing an error: “Could not find the
Cold Fusion Component javapackage.javaclass”. Any
clue?