Hi all, i bought WZR-HP-G300NH about 2 weeks ago. Everything work well, but 2-3 days ago wifi and lan speeds suddenly decreased from 80-90 mBps to 16-20 mBps. I tried different firmwares such like OpenWRT and dd-wrt, but get no result. It's a hardware problem? What should i do? I have no Buffalo technikal centres in my country, and i bought router by e-bay without any warranty..