Problem exporting

I don't understand... i've got dts exporter 0.91RC4, blender 2.41 & e Python 2.4 installed, all correctly (old exporter 0.89 worked without problems with same installation) but when exporting i got this error on console:

Using Python version 2.4
Traceback (most recent call last):
File "", line 41, in ?
File "C:\PYTHON23\LIB\re.py", line 5, in ?
from sre import *
File "C:\PYTHON23\LIB\sre.py", line 97, in ?
import sre_compile
File "C:\PYTHON23\LIB\sre_compile.py", line 17, in ?
assert _sre.MAGIC == MAGIC, "SRE module mismatch"
AssertionError: SRE module mismatch


What's the problem?