Slony-I - Update trigger on a replicated table

Anyone know if it is possible to create an update trigger on the destination side of a replicated table in Slony-I and
havethe replication itself cause the trigger to fire? I was able to add the trigger but when run the test transaction
through,it does not seem to be firing.  It works on the non-replicated version of the solution. 

Running postgres 8.4.1 and Slony-I 2.0.3