Amoury, you are right, when i unset the PYTHONHOME environment variable 
the program run. The output was:

root@host:python-2.6.5# ./python -m test.regrtest -w
test_grammar
test_opcodes
test_dict
test_builtin
test_exceptions
test_types
test_unittest
test_doctest
test_doctest skipped -- No module named thread
test_doctest2
test_MimeWriter
test_SimpleHTTPServer
test_StringIO
test___all__
test___future__
test__locale
test_abc
test_abstract_numbers
test_aepack
test_aepack skipped -- No module named aepack
test_aifc
test_al
test_al skipped -- No module named al
test_anydbm
test_applesingle
test_applesingle skipped -- No module named macostools
test_array
test_ast
test_asynchat
test_asynchat skipped -- No module named thread
test_asyncore
test_asyncore skipped -- No module named thread
test_atexit
test_audioop
test_augassign
test_base64
test_bastion
test_bigaddrspace
test_bigmem
test_binascii
test_binhex
test_binop
test_bisect
test_bool
test_bsddb
test_bsddb skipped -- No module named _bsddb
test_bsddb185
test_bsddb185 skipped -- No module named bsddb185
test_bsddb3
test_bsddb3 skipped -- Use of the `bsddb' resource not enabled
test_buffer
test_bufio
test_bytes
test_bz2
test_bz2 skipped -- No module named thread
test_calendar
test_call
test_capi
test_capi skipped -- No module named thread
test_cd
test_cd skipped -- No module named cd
test_cfgparser
test_cgi
test_charmapcodec
test_cl
test_cl skipped -- No module named cl
test_class
test_cmath
test test_cmath failed -- Traceback (most recent call last):
   File "/sw_install/python-2.6.5/Lib/test/test_cmath.py", line 366, in 
test_specific_values
     self.fail(error_message)
AssertionError: atan0000: atan(complex(0.0, 0.0))
Expected: complex(0.0, 0.0)
Received: complex(0.0, -0.0)
Received value insufficiently close to expected value.

test_cmd
test_cmd skipped -- No module named thread
test_cmd_line
test_cmd_line_script
test_code
test_codeccallbacks
test_codecencodings_cn
test_codecencodings_hk
test_codecencodings_jp
test_codecencodings_kr
test_codecencodings_tw
test_codecmaps_cn
test_codecmaps_cn skipped -- Use of the `urlfetch' resource not enabled
test_codecmaps_hk
test_codecmaps_hk skipped -- Use of the `urlfetch' resource not enabled
test_codecmaps_jp
test_codecmaps_jp skipped -- Use of the `urlfetch' resource not enabled
test_codecmaps_kr
test_codecmaps_kr skipped -- Use of the `urlfetch' resource not enabled
test_codecmaps_tw
test_codecmaps_tw skipped -- Use of the `urlfetch' resource not enabled
test_codecs
test_codeop
test_coding
test_coercion
test_collections
test_colorsys
test_commands
test_compare
test_compile
test_compiler
test_complex
test_complex_args
test_contains
test_contextlib
test_contextlib skipped -- No module named thread
test_cookie
test_cookielib
test_copy
test_copy_reg
test_cpickle
Exception RuntimeError: 'maximum recursion depth exceeded in 
__subclasscheck__' in <type 'exceptions.RuntimeError'> ignored
test test_cpickle failed -- multiple errors occurred; run in verbose 
mode for details
test_cprofile
test_crypt
test_csv
test_ctypes
test_ctypes skipped -- No module named _ctypes
test_curses
test_curses skipped -- No module named _curses_panel
test_datetime
test_dbm
test_decimal
test_decorators
test_defaultdict
test_deque
test_descr
test_descrtut
test_difflib
test_dircache
test_dis
test_distutils
unable to execute ./Modules/ld_so_aix: No such file or directory
test test_distutils failed -- Traceback (most recent call last):
   File 
"/sw_install/python-2.6.5/Lib/distutils/tests/test_build_ext.py", line 
261, in test_get_outputs
     cmd.run()
   File "/sw_install/python-2.6.5/Lib/distutils/command/build_ext.py", 
line 340, in run
     self.build_extensions()
   File "/sw_install/python-2.6.5/Lib/distutils/command/build_ext.py", 
line 449, in build_extensions
     self.build_extension(ext)
   File "/sw_install/python-2.6.5/Lib/distutils/command/build_ext.py", 
line 531, in build_extension
     target_lang=language)
   File "/sw_install/python-2.6.5/Lib/distutils/ccompiler.py", line 769, 
in link_shared_object
     extra_preargs, extra_postargs, build_temp, target_lang)
   File "/sw_install/python-2.6.5/Lib/distutils/unixccompiler.py", line 
258, in link
     raise LinkError, msg
LinkError: command './Modules/ld_so_aix' failed with exit status 1

test_dl
test_dl skipped -- Could not open any shared libraries
test_docxmlrpc
test_docxmlrpc skipped -- No module named thread
test_dumbdbm
test_dummy_thread
test_dummy_threading
test_email
test_email_codecs
test_email_renamed
test_enumerate
test_eof
test_epoll
test_epoll skipped -- test works only on Linux 2.6
test_errno
test_exception_variations
test_extcall
test_fcntl
test_file
test_file skipped -- No module named thread
test_filecmp
test_fileinput
test_fileio
test test_fileio failed -- Traceback (most recent call last):
   File "/sw_install/python-2.6.5/Lib/test/test_fileio.py", line 157, in 
testAbles
     self.assertEquals(f.seekable(), False)
AssertionError: True != False

test_float
test_fnmatch
test_fork1
test_fork1 skipped -- No module named thread
test_format
test_fpformat
test_fractions
test_frozen
test_ftplib
test_ftplib skipped -- No module named thread
test_funcattrs
test_functools
test_future
test_future3
test_future4
test_future5
test_future_builtins
test_gc
test_gdbm
test_gdbm skipped -- No module named gdbm
test_generators
test_genericpath
test_genexps
test_getargs
test_getargs2
test_getopt
test_gettext
test_gl
test_gl skipped -- No module named gl
test_glob
test_global
test_grp
test_gzip
test_hash
test_hashlib
test_heapq
test_hmac
test_hotshot
Segmentation fault (core dumped)

Thanks