As in gif,i press "sc" it selects the file,again i press sc it doesn't go to the other file.
Fayt doesn't work properly
It is working properly.
If you want to jump to another multi-character match based on what you typed, push F3.
(If memory serves, you asked repeatedly for the FAYT timeout to be in milliseconds. That feature was added in the last update but it doesn't look like you're using it. Note that if you do use it, F3 won't work unless you're very quick.)
Sir -- make it work without using F3
No, it's not designed that way, and I don't think it would really make sense with multiple letters.
Please try using it as it's designed to be used. It doesn't take long to get used to.