deploy et undeploy

#12261

hai friends,
I have a problem in undeployment
I have done a projet Biztalk in .NET and deployed it in biztalk server.I configured the ports .For every small changes I make in the projet,I create a new Biztalk Projet and do the manipulations (configuration of send and receive ports)manually in which I waste lot of time repeating the same thing .If i do the changes in the same projet ,it does not work.

I want to do changes in the same biztalk projet and deploy it .
Does anybody knows what I should do when I make small changes in my projet existant?