Auto Call forwarding not working with Audiocodes MP114

Does anybody encounter similar problems with Audiocodes gateway MP114 (2 FXO & 2 FXS)?

Incoming call ==> PSTN Line 1 ==> Audiocodes FXO3 ==> SIP Exten 208 ==> Auto forwarding to (XXXXXX external handphone number) ==> dial to Audiocodes FXO4 ==> PSTN Line2.

The above auto forwarding is working for TDM cards with 2 FXO ports but not for Audiocodes. Below are the syslog errors I received from Audiocodes:

Dec 16 11:28:44 192.168.15.166 ( sip_stack)(965 ) AcSIPParser: Problem in SIP Message Headers
Dec 16 11:28:44 192.168.15.166 ( sip_stack)(965 ) AcSIPParser: Problem in SIP Message Headers
Dec 16 11:28:44 192.168.15.166 ( sip_stack)(966 ) !! [ERROR] AcSIPParser: Parse Error. Unexpected symbol ';'. Expected ' Dec 16 11:28:44 192.168.15.166 ( sip_stack)(966 ) !! [ERROR] AcSIPParser: Parse Error. Unexpected symbol ';'. Expected ' Dec 16 11:28:44 192.168.15.166 ( sip_stack)(967 ) !! [ERROR] Message type: INVITE
Dec 16 11:28:44 192.168.15.166 ( sip_stack)(967 ) !! [ERROR] Message type: INVITE
Dec 16 11:28:44 192.168.15.166 ( sip_stack)(968 ) !! [ERROR] Source header:
Dec 16 11:28:44 192.168.15.166 ( sip_stack)(969 ) !! [ERROR] Line: 12. Column: 13

Really have no idea what does it mean........

thanks in advance.
johnny