If you're having trouble with your Bostitch roofing nailer, there are a few things you can do to try and unjam it. First, make sure that the magazine is properly loaded with nails. If it's not, that could be the problem. Also, check to see if there are any nails stuck in the feed mechanism. If so, carefully remove them. If neither of those solutions work, you may need to disassemble the nailer to clear the jam. Consult your owner's manual for instructions on how to do this.