Dostoo Mera Cafe Ki Networkin Aksar Masla Karti Hai ,, Sahi Networking Hai Magar Kabi Kabi Kam Nahi Karti Mera 9 system Hai 1 main server kabi kabi kuch system kam nahi kartay lakin hub ki light on hoti kam karta hai, muje to kuch samaj nahi ara. Please help me.