problem in compiling Lammps

Dear all,
I am trying to compile and use Lammps, it seems that it can compile completely

size …/lmp_mohammad
text data bss dec hex filename
3863480 11304 336 3875120 3b2130 …/lmp_mohammad
make[1]: Leaving directory `/home/malaghem/soft/mylammps/src/Obj_mohammad’

But when I want to use it for simulating a molecular system it can not realize my styles for example when I chose “pair_style lj/cut/coul/long 12.0” it says;

LAMMPS (13 Jul 2011)

ERROR: Invalid pair style

while the same system with the same input file can be ran with my old version of Lammps.
then I also make some optional package

make yes-molecule

but the problem exists.
Please let me know where is the problem if any of you have an idea.
Thanks in advance.

Best regards,
Mohammad

You need the package kspace.

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