Channel not specified

Hi, environment: Asterisk, Ubuntu 8.0.4 intel, kernel linux 2.6.24-23-generic 2 Processors AMD Athlon 64 X2 Dual Core 4400+, 2 GB RAM
Extensions 9999 and 58 are included into MySQL database “PBX” and I can call through 9999 and through 58 from SIP Twinkle software, that means that it works.
Extensions 58 and 9999 are also included into extensions.conf file.

Using CLI command line interface, everything works fine, but
Using Asterisk call manager, got the error “Channel not specified”:

Escape character is ‘^]’.
Asterisk Call Manager/1.1
Action: login
Events: off
Username: dmitry
Secret: secret

Response: Success
Message: Authentication accepted

Action: originate
Channel: SIP/58
WaitTime: 3000
CallerId: dima
Exten: 9999

Context: from-internal
Priority: 1

Response: Error
Message: Channel not specified

What could be the problem?