[Serusers] error when initializating module acc

[lilingling]

I have a problem with my SER configuration .when I start ser,the error
happens like this:
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[root at localhost local]# ser -E -D
 0(2796) WARNING: could not rev. resolve 135.252.20.230
Listening on
              127.0.0.1 [127.0.0.1]:5060
              135.252.20.230 [135.252.20.230]:5060
Aliases: localhost:5060 localhost.localdomain:5060
WARNING: no fork mode  and more than one listen address found (will use
only the the first one)
stateless - initializing
Maxfwd module- initializing
acc - initializing
 0(2796) ERROR: acc: can't get code for the Failed attribute value
 0(2796) init_mod(): Error while initializing module acc
ERROR: error while initializing modules
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Does anyone know about this ? Need your help!

Regards.