using mpich to compile siesta2.0.2

Dear all
when compiling siesta2.0.2with mpich ,it reports an error:
..........
 dc_lapack.a liblapack.a libblas.a /THFS/home/xauat-ch/lib/libscalapack.a /THFS/home/xauat-ch/lib/blacsCinit_MPI-LINUX-0.a /THFS/home/xauat-ch/lib/blacsF77init_MPI-LINUX-0.a /THFS/home/xauat-ch/l
ib/blacs_MPI-LINUX-0.a /THFS/home/xauat-ch/lib/liblapack.a /THFS/home/xauat-ch/lib/librefblas.a

cdiag.o: In function `cdiag_':
/THFS/home/xauat-ch/sourcecode/siesta-2.0.2/Src/cdiag.F:254: undefined reference to `descinit_'
/THFS/home/xauat-ch/sourcecode/siesta-2.0.2/Src/cdiag.F:327: undefined reference to `indxg2p_'
/THFS/home/xauat-ch/sourcecode/siesta-2.0.2/Src/cdiag.F:328: undefined reference to `indxg2p_'
/THFS/home/xauat-ch/sourcecode/siesta-2.0.2/Src/cdiag.F:332: undefined reference to `numroc_'
/THFS/home/xauat-ch/sourcecode/siesta-2.0.2/Src/cdiag.F:333: undefined reference to `numroc_'
....
pzheevd.f:(.text+0xea): undefined reference to `chk1mat_'
pzheevd.f:(.text+0x131): undefined reference to `chk1mat_'
pzheevd.f:(.text+0x235): undefined reference to `pchk2mat_'
pzheevd.f:(.text+0x470): undefined reference to `indxg2p_'
pzheevd.f:(.text+0x4a1): undefined reference to `indxg2p_
.....

this is my arch.make file
#
# This file is part of the SIESTA package.
#
# Copyright (c) Fundacion General Universidad Autonoma de Madrid:
# E.Artacho, J.Gale, A.Garcia, J.Junquera, P.Ordejon, D.Sanchez-Portal
# and J.M.Soler, 1996-2006.
#
# Use of this software constitutes agreement with the full conditions
# given in the SIESTA license, as signed by all legitimate users.
#
.SUFFIXES:
.SUFFIXES: .f .F .o .a .f90 .F90

SIESTA_ARCH=x86_64-unknown-linux-gnu--unknown

FPP=
FPP_OUTPUT=
FC= /THFS/home/xauat-ch/mpich2/bin/mpif90
RANLIB=ranlib

SYS=nag

SP_KIND=4
DP_KIND=8
KINDS=$(SP_KIND) $(DP_KIND)

FFLAGS=-g -O2
FPPFLAGS= -DMPI -DFC_HAVE_FLUSH -DFC_HAVE_ABORT -DGFORTRAN
LDFLAGS=

ARFLAGS_EXTRA=

FCFLAGS_fixed_f=
FCFLAGS_free_f90=
FPPFLAGS_fixed_F=
FPPFLAGS_free_F90=

HOME_LIB=/THFS/home/xauat-ch/lib
BLAS_LIBS=$(HOME_LIB)/librefblas.a
LAPACK_LIBS=$(HOME_LIB)/liblapack.a
BLACS_LIBS=$(HOME_LIB)/blacsCinit_MPI-LINUX-0.a $(HOME_LIB)/blacsF77init_MPI-LINUX-0.a $(HOME_LIB)/blacs_MPI-LINUX-0.a
SCALAPACK_LIBS=$(HOME_LIB)/libscalapack.a

COMP_LIBS=dc_lapack.a liblapack.a libblas.a

NETCDF_LIBS=
NETCDF_INTERFACE=

LIBS=$(SCALAPACK_LIBS) $(BLACS_LIBS) $(LAPACK_LIBS) $(BLAS_LIBS) $(NETCDF_LIBS)

#SIESTA needs an F90 interface to MPI
#This will give you SIESTA's own implementation
#If your compiler vendor offers an alternative, you may change
#to it here.
MPI_INTERFACE=libmpi_f90.a
MPI_INCLUDE=.
MPI_LIB=/THFS/home/xauat-ch/mpich2/lib
DEFS_MPI=-DMPI

#Dependency rules are created by autoconf according to whether
#discrete preprocessing is necessary or not.
.F.o:
 $(FC) -c $(FFLAGS) $(INCFLAGS) $(FPPFLAGS) $(FPPFLAGS_fixed_F) $<
.F90.o:
 $(FC) -c $(FFLAGS) $(INCFLAGS) $(FPPFLAGS) $(FPPFLAGS_free_F90) $<
.f.o:
 $(FC) -c $(FFLAGS) $(INCFLAGS) $(FCFLAGS_fixed_f) $<
.f90.o:
 $(FC) -c $(FFLAGS) $(INCFLAGS) $(FCFLAGS_free_f90) $<

when compiling siesta4.0 ,it reports the same error

please help me
thank you very much