Architecture issue

Hello,

I have Fedora Core 18 with 64 bit architecture. I have downloaded MGME, installed gfortran, gcc through yum for this architecture, then run 'yum groupinstall "Development Tools" ' to install all other building essentials.

I run MGME from the terminal, but not the in the new 'command-line' feature.

I can run ./bin/newprocess_mg5 without problems and the diagrams come out perfect. However, when I run ./bin/generate_events it comes the issue. The output error messagge is

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Generating 10000 events with run name run_01
survey run_01
compile directory
Error detected in sub-command generate_events
write debug file /home/sequi/mypapers/util/MadGraph5_v1_5_7/bbbar/run_01_tag_1_debug.log
If you need help with this issue please contact us on https://answers.launchpad.net/madgraph5
MadGraph5Error : A compilation Error occurs when trying to compile /home/sequi/mypapers/util/MadGraph5_v1_5_7/bbbar/Source.
 The compilation fails with the following output message:
     gfortran -O -w -ffixed-line-length-132 -o ../bin/internal/gen_ximprove gen_ximprove.o ranmar.o rw_routines.o open_file.o
     /usr/bin/ld: i386 architecture of input file `gen_ximprove.o' is incompatible with i386:x86-64 output
     /usr/bin/ld: i386 architecture of input file `ranmar.o' is incompatible with i386:x86-64 output
     /usr/bin/ld: i386 architecture of input file `rw_routines.o' is incompatible with i386:x86-64 output
     /usr/bin/ld: i386 architecture of input file `open_file.o' is incompatible with i386:x86-64 output
     gen_ximprove.o: In function `MAIN__':
     gen_ximprove.f:(.text+0x5a32): undefined reference to `__moddi3'
     gen_ximprove.f:(.text+0x5a6f): undefined reference to `__divdi3'
     ranmar.o: In function `ntuple_':
     ranmar.f:(.text+0x1035): undefined reference to `__moddi3'
     ranmar.f:(.text+0x1079): undefined reference to `__divdi3'
     ranmar.f:(.text+0x11a2): undefined reference to `__divdi3'
     collect2: error: ld returned 1 exit status
     make: *** [../bin/internal/gen_ximprove] Error 1

 Please try to fix this compilations issue and retry.
 Help might be found at https://answers.launchpad.net/madgraph5.
 If you think that this is a bug, you can report this at https://bugs.launchpad.net/madgraph5
quit
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It looks like an architecture issue, but I feel ignorant that I don't know how to solve it. Thanks in advance for your help! All the best,

Ezequiel