A few questions if you don't mind mate;
1. Where is this fanzine advertised? I've seen it mentioned on here when a new issue is due, but nowhere else.
2. Why haven't you at least got a Facebook page up & running for it? It's free, and would raise awareness. You'd have a potential audience of hundreds who will know when a new issue is due, and also a chance to advertise for some new articles from new writers.