Flex :: Data Binding With A Value Inside A Component ?

I'm using Flex with Cairngorm framework.I have a custom component which I create like this:

<components:FriendSearchPaginator id="searchResultsPaginator"
paginationElement="{_model.findFriendsPaginationElement}"
visible="{_model.friendsSearchResultsPaginatorVisible}" />

Where the findFriendsPaginationElement is inside the model locator:

public var
[Bindable]
findFriendsPaginationElement:PaginationElement = new PaginationElement();

Inside the custom component I have button that uses a property of findFriendsPaginationElement object:

<s:Button id="previousButton"
label=" prev "
click="paginateSearchResults(false)"
enabled="{_model.findFriendsPaginationElement.more_previous}"/>

But I get a warning from Flex that the binding wouldn't work that way and it doesn't. It works the first time I load up the component but every time I change findFriendsPaginationElement it doesn't reflect on the component. Do you know how I can go about doing this? (making changing a value in the binding variable changes the status of an element inside a component?)