RepRap Smart graphic display encoder not working

i am making a 3d printer using ramps1.4 shield and merlin firmware
just now i get lcd to work but encoder not working swich works but unable to scroll through menu
i tried replacing new encoder with no luck

No code, no schematic, no details of components and Arduino being used you and posted in the wrong forum section

Your post was MOVED to its current location as it is more suitable.

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what codes you needed sir
also i searched for merlin rep rap on forum not found anything so posted here

There is no need to call me sir

In order to provide help with your code it would be helpful to see it along with a diagram of your circuit

did u ever heard about merlin fw setup or just posting replies ????

I have heard of Merlin but I don't have a copy of the code and I certainly do not know what you may have changed in it or how the encoder is connected