Madweight error while using mssm model

Hi,

I am using Madweight for the following process.

MG5_aMC>generate p p > ul ul, (ul> u n1)

I put the .lhco file in the Events folder (/Events/input.lhco)

I choose transfer function (all_delta) and edited the Madweight Card. Since I want to vary the ul mass, I edited the Block MW_parameter following way

#
# # first parameter #
     11 mass # Block of the parameter to change
     12 1000002 # id of the parameter to change
     13 400 # here you can enter the different values:
     13 450
     13 500
     13 550
     13 600
     13 650 # add a new line with tag 13 to introduce a new value
#

But the launch stops with the following error message-

Error detected in "launch"
write debug file MW5_debug
If you need help with this issue please contact us on https://answers.launchpad.net/mg5amcnlo
MadGraph5Error : A compilation Error occurs when trying to compile /data/MG5_aMC_v2_5_4/squark_events/SubProcesses/P1_qq_ulul_ul_qn1_ul_qn1.

The compilation fails with the following output message:
     gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -w -c -o driver.o driver.f
     gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -w -c -o d_choices.o d_choices.f
     gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -w -c -o main_code.o main_code.f
     gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -w -c -o gen_ps.o gen_ps.f
     gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -w -c -o initialization.o initialization.f
     gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -w -c -o call_TF.o call_TF.f
     gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -w -c -o permutation.o permutation.f
     gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -w -c -o multi_channel.o multi_channel.f
     gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -w -c -o permutation_weight.o permutation_weight.f
     permutation_weight.f:36.71:

                     weight = weight * weight_perm_BW(perm, perm_id, mdl_MGO, mdl_WG
                                                                            1
     Error: Symbol 'mdl_mgo' at (1) has no IMPLICIT type
     permutation_weight.f:25.71:

                     weight = weight * weight_perm_BW(perm, perm_id, mdl_MUL, mdl_WU
                                                                            1
     Error: Symbol 'mdl_mul' at (1) has no IMPLICIT type
     permutation_weight.f:36.80:

                weight = weight * weight_perm_BW(perm, perm_id, mdl_MGO, mdl_WGO, co
                                                                                1
     Error: Symbol 'mdl_wgo' at (1) has no IMPLICIT type
     permutation_weight.f:25.80:

                weight = weight * weight_perm_BW(perm, perm_id, mdl_MUL, mdl_WUL, co
                                                                                1
     Error: Symbol 'mdl_wul' at (1) has no IMPLICIT type
     make: *** [permutation_weight.o] Error 1

Can you help?

Thanks!
Dipsikha