Using PLL-testbenches in MMSIM11 64bits on IC615.509

Hello guys, I really appreciate any help with this simulation error.I am working with IC615.509 and MMSIM 11.10.341

 I am trying to run a phase noise simulation via "transient noise" and I am having this error when trying to simulate. Basically, after I set up the testbench (ADEGXL), spectre uses a plugin for calling some binary libs of the PLL-testbench. Doing so, spectre calls the 32 bit version of the libs instead of the 64 bit one, which are curiosly located at the same path but in the 64bit directory: $MMSIM/tools/spectre/lib/64bit.

My question is: How should I set up my testbench to pick the right version of the libs?

Thanks.

PD: Some ways to deal with this problems (not the best for sure) are:

1) Create links for the 64bit libraries inside the 32bits directory.

2) Running spectre from command line but editing the "plugin sentence" to point at the right libraries.

From spectre.out

Command line:
     \
        /local/linux/cadence/mmsim11.10.341/tools.lnx86/spectre/bin/64bit/spectre  \
        input.scs +escchars +log ../psf/spectre.out -format psfxl -raw  \
        ../psf +lqtimeout 900 -maxw 5 -maxn 5 -plugin  \
        /local/linux/cadence/mmsim11.10.341/tools.lnx86/spectre/lib/libpllMMpsd_sh.so  \
        -cmiconfig  \
        .../test/CS/adexl/results/data/Interactive.82/1/test:CS:1/netlist/pllcmi.cfg


Loading /local/linux/cadence/mmsim11.10.341/tools.lnx86/spectre/lib//libpll_sh.so ...

Warning from spectre.
    WARNING (SPECTRE-4067): Error opening shared object:/local/linux/cadence/mmsim11.10.341/tools.lnx86/spectre/lib//libpll_sh.so: wrong ELF class: ELFCLASS32.
        If the shared object is generated from verilog-A module with different simulator version, regenerate it with the current simulator.
Error found by spectre.
    ERROR: Failed to load plugin '/local/linux/cadence/mmsim11.10.341/tools.lnx86/spectre/lib/libpllMMpsd_sh.so': /local/linux/cadence/mmsim11.10.341/tools.lnx86/spectre/lib/libpllMMpsd_sh.so: wrong ELF class: ELFCLASS32