Redeploying application, but still executes old functionality

I have an orchestration (BizTalk project, for that matter) that I have deployed. I've been making changes to the orchestration (reformatting my failed messages) and it seems like no matter what I do, whenever I redeploy, the changes aren't taking effect. I do the following,

 1.)  Stop my application in the BT admin console (full stop)

2.)  Undeploy the assembly in BT explorer in VS 2005. – refresh

3.)  Delete the application in VT admin console

4.)  Rebuild the app in VS 2005, then deploy.

5.)  Refresh, Configure the app host in BT admin console, then start it (no errors)

 When I do my file drops, my output files are of the same format as they were the first time I built and deployed. At one point, I had to create a whole new app and project before I could see any changes. Anyone have any ideas what I'm missing so that I can deploy my latest changes?

Any help would be greatly appreciated,

Chris