I have integrated mailman with zimbra cs, when I run service mailman start, I got the error message, like this :

[root@mail ~]# service mailman start Starting mailman: Traceback (most recent call last):   File "/usr/lib/mailman/bin/mailmanctl", line 113, in ?     from Mailman.MailList import MailList   File "/usr/lib/mailman/Mailman/MailList.py", line 49, in ?     from Mailman.ZimbraIntegration import ZimbraIntegration   File "/usr/lib/mailman/Mailman/ZimbraIntegration.py", line 4     try:     ^ SyntaxError: invalid syntax                                                            [FAILED]
What can I this possible ? Any suggestion will be appreciate

thank