Now please let me know how can i access this Action class under my Flex Application and call the setter Method of it to set the value for the name .
For example on entering some data in a TextInput and click of a submit Button , on to the Event Listener , i want to call the set name method of my ActionScript class .
Why are you using getter and setter methods? Normal practice would be to just just a property. And why does your getter return a different property? Binding will behave differently (in Flex3) when a method is bound rather than a property.
Sounds like you maybe need to go and read the documentation. It will be far quicker than waiting for answers from us.