Hi Rajesh,
if your system is unicode or not, that should be a basic thing you have to know. Your a developer!
Work through the suggested notes and if you are facing again problems, you come back again and ask for further support. There is a lot of discussions here, what you can do to get your question answered.
IT is also the wrong space, this space ABAP Development is the correct one for questions like that.
~Florian
PS: Read through the ROE. 3rd and 4th point right here