Visual Studio deployment package - stop deleting all files

Perhaps I'm missing a setting here...seems like I am, but I cant see it!!

I have a deployment package, which works except...it deletes everything in the site that I am deploying to. I have a web applicati开发者_开发知识库on beneath the site that I am deploying and I dont want that to be touched. That has its own deployment package.

Any ideas?

Thx