Still, if the church had enough power to stop Tetzel from selling indulgences, why wasn’t it able to stop the reformers from breaking away?[/quote:3kei1a82]
You are talking about 2 different things. In Tetzel’s case his allegiance was to the Church. In the case of the Reformers their allegiance was much less to the Church. You can’t stop people from breaking off into their own sect if they want to.

Maybe the simple reality is that Tetzel realized he was wrong whereas the Reformers wanted to continue to push their own agenda.