x5 won't start (fuel problems?)

[isdeleon]

Hope you guys can help me. I left my 2000 x5 for a while, i guess around five months without turning it on (i know i know, what was i thinking...). When I was about to use it again, i had to recharge the battery because it had been sitting a while. Now i try to turn the x5 on and it only sounds like its cranking but it never actually turns on. I was told to replace the fuel pump, which i did, but still nothing. The fuel pump doesn't sound like it's working, but i'm sure it's not the fuel pump now but something else. i also replace the fuel pump relay, but nothing. i can't wait to drive it again... any help would be appreciated, i know you guys are the best. also somebody told me i would probably have to reprogram the key to the x5, but i just tried it and doesn't seem to work. just cranks and cranks but nothing.