im newbies…
i want to build hotspot using rb750,
anyone can show me step by step configuration…
plz help me… 
It’s all in the wiki…
http://wiki.mikrotik.com/wiki/Manual:IP/Hotspot
after i generate cupon, i try to login but error “RADIUS not responding”
anyone can help me? 
Did you configure radius corectly on the MT?
Is your radius server working correctly?
heheheheee…
how to configure RADIUS?can u teach me? 
Sure, no problem.
http://wiki.freeradius.org/Main_Page 
Kind regards
i cant understand..any picture or video?
No, learn reading. Seriously, get a book and use google to get some basics understanding. The world is full of people who want to do things without spending effort. You want tk now what you do, or behave professional, learn reading documentation.
thanks bro…