my man city - wt roles are the best for my players

[babu]

this is my first eleven and their roiles and dutys
i somehow feel some of my players aint performing.

gk joe hart
rb micah richards - wingback support with hug touchline
lb - clichy - wingback support with hug touchline
both cb are normal central defenders
mcr - javi martinez - deep lying playmaker defend
yaya toure - box to box midfielder support
amr - hulk inside forward -attack
aml - nasri inside forward -attack
amc - david silva advanced playmaker attack
st - aguero - poacher attack