firmware for k 810 i

i have been using k 819 i for the last one and half year. recently when i tried to install an application in my mother tongue, the letters are not displayed.and in that webpage ( from where i downloaded the application) it is mentioned that firmware has to be installed first to view the letters, or else instead of letters boxes will appear. but when i checked m mobile i understood that firmware is already there ( my software version is : CXC1250811 R8BA024 071010 Can any one help me please :a018: