hiepyeuh

hello everyone ! i have a fault in DVR APLIC (Beltech)- do u know 'bout it ?. i downloaded firmware file of this DVR .And i tried to upgrade new version for it but it could not find out the firmware file. WHat can i do now ?> PLz show me how to set DVR to accept that file or send me a file which can suited with that DVR. thank u so much