help in simulation

hi everybody

i want to simulate cnt and water through but i get this error

Incorrect args for pair coefficientspair_style coul/long 10

#pair_style lj/charmm/coul/charmm 10 12

pair_coeff 1 2 0.105 3.1905
pair_coeff 1 3 0.000 0.000
pair_coeff 1 1 0.0700 3.5500 #ca
pair_coeff 2 2 0.1521 3.5365 #OW
pair_coeff 3 3 0.0000 0.0000 #HW
pair_coeff 2 3 0.0000 0.000

(interaction between H and all other atoms are zero)

1 C

#2 O

#3 H

can anybody help me?

Any help would be appreciated

tnx

http://lammps.sandia.gov/doc/Section_errors.html