Rabbitmq problem after upgrade 2.04 to 2.13

Airtime is not working after upgrading. There seems to be some problem with rabbitmq:
$ sudo invoke-rc.d airtime-media-monitor status
AIRTIME_STATUS_URL             = http://localhost:80/api/status/format/json/api_key/%%api_key%%
AIRTIME_SERVER_RESPONDING      = OK
KERNEL_VERSION                 = 2.6.38-8-generic
MACHINE_ARCHITECTURE           = i686
TOTAL_MEMORY_MBYTES            = 3094432
TOTAL_SWAP_MBYTES              = 2059260
AIRTIME_VERSION                = 2.1.3
OS                             = Linux Mint 11 Katya i686
CPU                            = AMD Phenom(tm) 8550 Triple-Core Processor
WEB_SERVER                     = Apache/2.2.17 (Ubuntu)
PLAYOUT_ENGINE_PROCESS_ID      = 1517
PLAYOUT_ENGINE_RUNNING_SECONDS = 35271
PLAYOUT_ENGINE_MEM_PERC        = 0.3%
PLAYOUT_ENGINE_CPU_PERC        = 0.0%
LIQUIDSOAP_PROCESS_ID          = 1532
LIQUIDSOAP_RUNNING_SECONDS     = 35271
LIQUIDSOAP_MEM_PERC            = 0.4%
LIQUIDSOAP_CPU_PERC            = 10.8%
MEDIA_MONITOR_PROCESS_ID       = 1499
MEDIA_MONITOR_RUNNING_SECONDS  = 35271
MEDIA_MONITOR_MEM_PERC         = 0.3%
MEDIA_MONITOR_CPU_PERC         = 0.0%
RABBITMQ_PROCESS_ID            = NOT MONITORED
RABBITMQ_RUNNING_SECONDS       = 1
RABBITMQ_MEM_PERC              = 0%
RABBITMQ_CPU_PERC              = 0%

-- There appears to be a problem with your Airtime installation.

-- Please visit http://wiki.sourcefabric.org/x/HABQ
invoke-rc.d: initscript airtime-media-monitor, action "status" failed.

any solutions?