HTC Sensation ROMS not booting up


Hi guys this is my first post on the forum.I have rooted my Sensation and have tried several ROMS like ExtremeSensation,Sense4,Elegancia Sensation.But none of them worked,i rooted my Sensation installed those above roms and they always stuck on boot screen and never boots up.Why is that.? I have never done EXT4 Partition and i dont know what this thing is.My main concern is why those roms dont boot up.? Only Android Revolution HD worked but that was draining battery like hell.Please help me guys.Why roms stuck on splash screen.?