When I run the python test code I got the SASL error. But it's ok if I run the C sample code. Do you know the reason?

Here is the message:

libvir: RPC error : authentication failed: Failed to start SASL negotiation: -4 (SASL(-4): no mechanism available: No worthy mechs found)

Traceback (most recent call last):

File "esxList.py", line 101, in ?

conn = libvirt.openAuth(uri, auth, 0)

File "/usr/lib/python2.4/site-packages/libvirt.py", line 102, in openAuth

if ret is None:raise libvirtError('virConnectOpenAuth() failed')

libvirt.libvirtError: authentication failed: Failed to start SASL negotiation: -4 (SASL(-4): no mechanism available: No worthy mechs found)

Thanks,

-Hubert