Attended Trasfers using HMP 3.0

[olren]

Attender Trasfers using HMP 3.0

I'm trying to make attended trasfer from a media server using Intel Dialogic HMP 3.0 API.

The scenation:

1. HMP media server receives a call from Soft phone through 3CX PBX.
2. HMP media server make a new call to another softphone through 3CX PBX.
3. HMP media server requests 3CX PBX to do attended transfer.
4. Transfer is rejected by 3CX PBX with an error "Cannot build target transfer by DBcfg"

Any help will be appreciated.

Thank you