Probably because of its Auto closing issue which I proffered a solution to Here, or for whatever reason, best known to you, then SL4 could be your best Alternative apart from Open VPN. If you are still having problems, setting up MTN Bis of 3gb at #100 per day, 3gb for #500 per week or 3gb for #1000 per month on your Android phone, with Simple Android Server (Simple server.apk).
