rank help !!!

ok i need help i want to buy zp with paypal but every time i try it says i need to be rank 6 in crossfire what rank is this im rank SERGEANT 1 atm is that not 6

1...TRAINEE 1
2...TRAINEE 2
3...PRIVATE
4...PFC
5...CORPORAL
6...SERGEANT 1


im :@ atm, some one help me thanks