My Mikrotik Doesn't Connect to winbox, Why ?

Last night i and some friends learned together in Adit's house ,
we learned for Final exam on Tuesday .
LAN !! Yeah, we must Play hard , Work Hard and Pray Hard. All of us must finishes the case like setup Win Server, Mikrotik, Client and Cabling .
i dont know on tuesday what can i handle ?
but we must be master of all case. Oke back to the problem, i have some problem with my mikrotik, i can't acces my mikrotik in winbox app, i have reset the winbox, turn off the firewall , reboot pc, check IP and it still doesn't work .
i confused , but not long after i found the trouble and i can solving that.

if your mikrotik doesn't Connect to winbox app, you can check
1. Your Firewall must Off
2. Check The cable is ok
3. Disable all connection , except "LAN"
4. Finsih and enjoy your setting :D

if still doesn't work , you must buy the NEW MIKROTIK  :p