Can not start asterisk

Hi All,

After upgrading from Ubuntu 10.04(asterisk was running fine) to Ubuntu 11.04, asterisk(1.8.3) does not work

logs

[code][Apr 3 00:00:44] VERBOSE[2504] asterisk.c: – Remote UNIX connection disconnected
[Apr 3 00:00:44] VERBOSE[2457] asterisk.c: Executing last minute cleanups
[Apr 3 00:00:44] VERBOSE[2457] res_musiconhold.c: == Destroying musiconhold processes
[Apr 3 00:00:46] NOTICE[2874] cdr.c: CDR simple logging enabled.
[Apr 3 00:00:46] NOTICE[2874] loader.c: 180 modules will be loaded.
[Apr 3 00:00:46] NOTICE[2874] res_smdi.c: No SMDI interfaces are available to listen on, not starting SMDI listener.
[Apr 3 00:00:46] NOTICE[2874] chan_skinny.c: Configuring skinny from skinny.conf
[Apr 3 00:00:46] VERBOSE[2874] chan_sip.c: SIP channel loading…
[Apr 3 00:00:46] VERBOSE[2874] res_clialiases.c: == Aliased CLI command ‘hangup request’ to ‘channel request hangup’
[Apr 3 00:00:46] VERBOSE[2874] res_clialiases.c: == Aliased CLI command ‘originate’ to ‘channel originate’
[Apr 3 00:00:46] VERBOSE[2874] res_clialiases.c: == Aliased CLI command ‘help’ to ‘core show help’
[Apr 3 00:00:46] VERBOSE[2874] res_clialiases.c: == Aliased CLI command ‘pri intense debug span’ to ‘pri set debug 2 span’
[Apr 3 00:00:46] VERBOSE[2874] res_clialiases.c: == Aliased CLI command ‘reload’ to ‘module reload’
[Apr 3 00:00:46] NOTICE[2874] pbx_ael.c: Starting AEL load process.
[Apr 3 00:00:46] NOTICE[2874] pbx_ael.c: AEL load process: parsed config file name ‘/etc/asterisk/extensions.ael’.
[Apr 3 00:00:46] NOTICE[2874] pbx_ael.c: AEL load process: checked config file name ‘/etc/asterisk/extensions.ael’.
[Apr 3 00:00:46] NOTICE[2874] pbx_ael.c: AEL load process: compiled config file name ‘/etc/asterisk/extensions.ael’.
[Apr 3 00:00:46] NOTICE[2874] pbx_ael.c: AEL load process: merged config file name ‘/etc/asterisk/extensions.ael’.
[Apr 3 00:00:46] NOTICE[2874] pbx_ael.c: AEL load process: verified config file name ‘/etc/asterisk/extensions.ael’.

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