The problem of computing band of the system!

ntegration in 3d (fixed mesh): ipa=    6  f3= F
npri,iomax,iomin, thres,  rmaxp,    sp
0    6    1   0.00010   10.00    1.00
Integration points, checksum  0    153944   1231644    1922.021356

vxcg/d_diis workspace has max memory requirements       780.9 MB

p_diis workspace has max memory requirements       769.1 MB

matrix diagonalization has max memory requirements  2112.2 MB      141.9   150.3  1820.0

population matrix assembly has max memory requirements  1956.5 MB      141.9   150.3  1664.3

real array elements, matrices vectors etc:     673.7 MB
integer arrays                           :      25.8 MB
min recommended for all-incl workspace   :    1517.3 MB
Total memory allocated for arrays         :    2112.2 MB

disk space needed for TPSMX (r)      190.8 MB
per k-point (    21) for TPVEC       612.5 MB
Total disk space needed for TPVEC       1.84 GB

insufficient memory for this job
increase Max_memory if possible to     2112.2 MB
Message: DMol3 job failed
Error: DMol3 exiting
Message: License checkin of MS_dmol successful
Message: License checkin of MS_dsolid successful

And input is like this :

alculate                     energy
use_old_density_and_keep      on
empty_bands                   30

Symmetry                      off

# Electronic parameters
Spin_polarization             unrestricted
Charge                        0
Basis                         dnp
Pseudopotential               dspp
Functional                    pbe
Aux_density                   octupole
Integration_grid              medium
Occupation                    thermal 0.005
Cutoff_Global                 3.7000 angstrom
Scf_iterations                100
# Kpoint definition file:
Kpoints                       file
22hhS@C59N-1_BandStr.kpoints

plot_dos                      on
plot_pdos                     on

In fact ,I install 24G memory in my system !!

What's the matter ?