When you send a "push" it means that the other person you are trying to connect to is behind a firewall. It's got nothing to do with you. However, it does become a problem if both of you are behind a firewall. But, since you've shut yours off, the only thing I can think of is that none of the hosts are accepting incoming connections for the file you're trying to get. This may be due to them being behind firewalls or else they simply do not have the upload slots available. I've had this happen a lot myself. I'm not sure what else to suggest to fix it.