asterisk users - Jul 2013 - Asterisk dropping calls on transfer

Hi, 

I'm having a weird problem with asterisk
(asterisk18-1.8.12.2_1). Every call on the system, whatever it comes
from the PSTN or from local extensions, when we hit the '#' button to
transfer the call, asterisk just disconnects it, without any error or
log, here is my current features configuration: 

Builtin Feature
Default Current
--------------- ------- -------
Pickup *8 *8 
Blind
Transfer # *4 
Attended Transfer # 
One Touch Monitor 
Disconnect Call *
* 
Park Call 
One Touch MixMonitor 

Dynamic Feature Default
Current
--------------- ------- -------
(none) 

Feature
Groups:
---------------
(none) 

Call parking (Parking lot:
default)
------------
Parking extension : 70
Parking context :
parkedcalls
Parked call extensions: 71-91
Parkingtime : 45000
ms
MusicOnHold class : default
Enabled : Yes 

Can anybody help me? 
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