Helpppp! Jailbreak issues

i just updated my itunes to 11.4.0 or what ever it is, i have tried jailbreaking it and it says it all worked out but then when i plug it in tv it shows apple logo then light continues to blink and the screen is black. i dowanloaded the newest version or close to it (5.0) of seasonpass. what am i doing wrong?

i have a dell inspiron 1520 laptop, i think windows 7 is running on it.