Hello I have a problem. I can't download any file without using file download manager, can't watch streams. Router is closing socket connections after a few seconds. Espe cially 443 https. I think it's doing that after last fw upgrade. Before that everything worked ok. I asked ISP if they have some troubles but they denied. So I investigated it myself. It came to my faulty router. Now I'm using second one and everything works ok. I tried rebooting router, resetting it, reflashing firmware, turning on DMZ, turning off firewall application layer services. Nothing worked. I can't downgrade either because error pops up that this BIN file is wrong. I don't want to send it on warranty because I threw out box and receipt.... 

Can you help me? At least provide me with proper BIN file so I can downgrade FW because bin's from your website don't work.