loading xspec local models

Hi,
   I am new to ISIS. I have ISIS 1.4.3 binary version and heasoft 6.1.2 
installed. I can use xspec11 models within ISIS.  I have complied 
xspec11 local models which work perfectly. However, when I try to load 
these into ISIS, it says:

isis> load_xspec_local_models("/soft/xspec_loc_model");
loading /soft/xspec_loc_model/libxspec_lfn_6.1.so
failed loading nthcomp/nthcomp
failed loading warmabs/fwarmabs
failed loading hotemis/fhotems
failed loading hotabs/fhotabs
failed loading kdblur/kdblur
failed loading kdblur2/kdblur2

Any help?

-gulab
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