[flexcoders] Active collection does not get refreshed automatically if using findbyXXX

[trenzig]

var ac:ArrayCollection=new ArrayCollection();
ac=ActiveRecords.SiteMedia.findAll();

The above works perfectly and get automatic refreshed if new records have been 
added or removed. However, if we do

var ac:ArrayCollection=new ArrayCollection();
ac=ActiveRecords.SiteMedia.findBySite_ID(1);

The above arraycollection does not get automatic refreshed if new records have 
been added or removed.

Help, please 

Thanks