Congestion and Hang-up

the autodialer (and manual dialing) passes only few calls, the majority of calls are hangu-up. I tried with 2.04rc1 and updateed to 2.04rc3 and it's the same probleme. My provider don't seem to have the calls from my server.
-- Executing DeadAGI("Local/90559600369@default-bc43,2", "agi://127.0.0.1:4577/VD_hangup--HVcauses--PRI-----NODEBUG-----1-----CONGESTION----------)") in new stack
-- AGI Script agi://127.0.0.1:4577/VD_hangup--HVcause ... ----------) completed, returning 0
-- SIP/331001-082d6b90 is circuit-busy
== Everyone is busy/congested at this time (1:0/1/0)
-- Executing Hangup("Local/90559280105@default-6193,2", "") in new stack
== Spawn extension (default, 90559280105, 3) exited non-zero on 'Local/90559280105@default-6193,2'
-- Executing DeadAGI("Local/90559280105@default-6193,2", "agi://127.0.0.1:4577/VD_hangup--HVcauses--PRI-----NODEBUG-----1-----CONGESTION----------)") in new stack
-- AGI Script agi://127.0.0.1:4577/VD_hangup--HVcause ... ----------) completed, returning 0
-- Executing AGI("SIP/303-b6114d48", "agi://127.0.0.1:4577/call_log") in new stack
-- AGI Script agi://127.0.0.1:4577/call_log completed, returning 0
-- Executing Dial("SIP/303-b6114d48", "SIP/331001/0033561276880|55|tTo") in new stack
-- Called 331001/0033561276880
-- SIP/331001-0832c978 is circuit-busy
== Everyone is busy/congested at this time (1:0/1/0)
-- Executing Hangup("SIP/303-b6114d48", "") in new stack
== Spawn extension (default, 90033561276880, 3) exited non-zero on 'SIP/303-b6114d48'
-- Executing DeadAGI("SIP/303-b6114d48", "agi://127.0.0.1:4577/VD_hangup--HVcauses--PRI-----NODEBUG-----1-----CONGESTION----------)") in new stack
-- AGI Script agi://127.0.0.1:4577/VD_hangup--HVcause ... ----------) completed, returning 0
== Manager 'sendcron' logged off from 127.0.0.1
== Manager 'sendcron' logged off from 127.0.0.1
-- Executing AGI("SIP/303-b6117968", "agi://127.0.0.1:4577/call_log") in new stack
-- AGI Script agi://127.0.0.1:4577/call_log completed, returning 0
-- Executing Dial("SIP/303-b6117968", "SIP/331001/0033561276880|55|tTo") in new stack
-- Called 331001/0033561276880
-- SIP/331001-0832c978 is circuit-busy
== Everyone is busy/congested at this time (1:0/1/0)
-- Executing Hangup("SIP/303-b6117968", "") in new stack
== Spawn extension (default, 90033561276880, 3) exited non-zero on 'SIP/303-b6117968'
-- Executing DeadAGI("SIP/303-b6117968", "agi://127.0.0.1:4577/VD_hangup--HVcauses--PRI-----NODEBUG-----1-----CONGESTION----------)") in new stack
-- AGI Script agi://127.0.0.1:4577/VD_hangup--HVcause ... ----------) completed, returning 0
-- Executing DeadAGI("Local/90559600369@default-bc43,2", "agi://127.0.0.1:4577/VD_hangup--HVcauses--PRI-----NODEBUG-----1-----CONGESTION----------)") in new stack
-- AGI Script agi://127.0.0.1:4577/VD_hangup--HVcause ... ----------) completed, returning 0
-- SIP/331001-082d6b90 is circuit-busy
== Everyone is busy/congested at this time (1:0/1/0)
-- Executing Hangup("Local/90559280105@default-6193,2", "") in new stack
== Spawn extension (default, 90559280105, 3) exited non-zero on 'Local/90559280105@default-6193,2'
-- Executing DeadAGI("Local/90559280105@default-6193,2", "agi://127.0.0.1:4577/VD_hangup--HVcauses--PRI-----NODEBUG-----1-----CONGESTION----------)") in new stack
-- AGI Script agi://127.0.0.1:4577/VD_hangup--HVcause ... ----------) completed, returning 0
-- Executing AGI("SIP/303-b6114d48", "agi://127.0.0.1:4577/call_log") in new stack
-- AGI Script agi://127.0.0.1:4577/call_log completed, returning 0
-- Executing Dial("SIP/303-b6114d48", "SIP/331001/0033561276880|55|tTo") in new stack
-- Called 331001/0033561276880
-- SIP/331001-0832c978 is circuit-busy
== Everyone is busy/congested at this time (1:0/1/0)
-- Executing Hangup("SIP/303-b6114d48", "") in new stack
== Spawn extension (default, 90033561276880, 3) exited non-zero on 'SIP/303-b6114d48'
-- Executing DeadAGI("SIP/303-b6114d48", "agi://127.0.0.1:4577/VD_hangup--HVcauses--PRI-----NODEBUG-----1-----CONGESTION----------)") in new stack
-- AGI Script agi://127.0.0.1:4577/VD_hangup--HVcause ... ----------) completed, returning 0
== Manager 'sendcron' logged off from 127.0.0.1
== Manager 'sendcron' logged off from 127.0.0.1
-- Executing AGI("SIP/303-b6117968", "agi://127.0.0.1:4577/call_log") in new stack
-- AGI Script agi://127.0.0.1:4577/call_log completed, returning 0
-- Executing Dial("SIP/303-b6117968", "SIP/331001/0033561276880|55|tTo") in new stack
-- Called 331001/0033561276880
-- SIP/331001-0832c978 is circuit-busy
== Everyone is busy/congested at this time (1:0/1/0)
-- Executing Hangup("SIP/303-b6117968", "") in new stack
== Spawn extension (default, 90033561276880, 3) exited non-zero on 'SIP/303-b6117968'
-- Executing DeadAGI("SIP/303-b6117968", "agi://127.0.0.1:4577/VD_hangup--HVcauses--PRI-----NODEBUG-----1-----CONGESTION----------)") in new stack
-- AGI Script agi://127.0.0.1:4577/VD_hangup--HVcause ... ----------) completed, returning 0