[Q] PlEASE HELP! Problem whit install rom!

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http://forum.xda-developers.com – I download asus original firmware and put in sd card ( internal and external ) when i flash it from recovery thats not done! it's not complete process and sey faild! should i relock bootloader or instal stock boot.img or somting?! my previuse rom is origial and update to and i try to install [ROM] ASUS-HYDRO 4.4-(8/10)-TF300/TF300tg--Super Fast!!!! but after finish and reboot stuck on logo so i wipe it and try to install original firmware but it dosent work!!! Pleeeeeeeease Help meeeee :( (HowTos)