2.0.1 can not streaming to icecast2

I've just installed the latest version 2.0.1 and i have icecast in other machine. The airtime can not connect to icecast2 server.
this is the message at web browser:

Can not connect to the streaming server

401, Authentication Required (HTTP 1.0)

I follow instruction from this thread http://forum.sourcefabric.org/discussion/11438/1.8.2-not-streaming-to-icecast/p1

but did not solve my problem so i make this new title.

this is the airtime-check-system
# airtime-check-system
AIRTIME_STATUS_URL             = http://localhost/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            = 1014448
TOTAL_SWAP_MBYTES              = 538140
AIRTIME_VERSION                = 2.0.1
OS                             = Ubuntu 11.04 i686
CPU                            = Intel(R) Atom(TM) CPU N550   @ 1.50GHz
WEB_SERVER                     = Apache/2.2.17 (Ubuntu)
PLAYOUT_ENGINE_PROCESS_ID      = 4727
PLAYOUT_ENGINE_RUNNING_SECONDS = 44160
PLAYOUT_ENGINE_MEM_PERC        = 0.5%
PLAYOUT_ENGINE_CPU_PERC        = 0.0%
LIQUIDSOAP_PROCESS_ID          = 4730
LIQUIDSOAP_RUNNING_SECONDS     = 44160
LIQUIDSOAP_MEM_PERC            = 1.7%
LIQUIDSOAP_CPU_PERC            = 4.2%
MEDIA_MONITOR_PROCESS_ID       = 1308
MEDIA_MONITOR_RUNNING_SECONDS  = 45465
MEDIA_MONITOR_MEM_PERC         = 0.7%
MEDIA_MONITOR_CPU_PERC         = 0.0%
SHOW_RECORDER_PROCESS_ID       = 1331
SHOW_RECORDER_RUNNING_SECONDS  = 45464
SHOW_RECORDER_MEM_PERC         = 0.5%
SHOW_RECORDER_CPU_PERC         = 0.0%
RABBITMQ_PROCESS_ID            = 1502
RABBITMQ_RUNNING_SECONDS       = 45450
RABBITMQ_MEM_PERC              = 0.6%
RABBITMQ_CPU_PERC              = 0.0%

-- Your installation of Airtime looks OK!