i am editing my router by web http://192.168.88.1/webfig/#Quick_Set
model of router is rb951g-2hnd

i try to edit router on static IP from provider. I have like this:
Address Acquisition - static
WAN IP Address - i put static IP from ISP
gateway 84.255.192.1 from my ISP
dns: 84.255.209.79 & 84.255.210.79

than i click apply....after rebooting of router .....router fail in some mode....LED blinking....have internet....but not IP (static) which i wrote ....


what to do?

It can be many things. Seems you are not familiar with networking at all. I would suggest to remove the configuration and set it thru winbox from scratch.