Asterisk IT - La telefonia Open Source

hi to all,

i installed the 2.6 trixbox version and hylafax + iaxmodem;

i got this when i try to receive a fax :

-- Executing [in_fax@ext-fax:2] GotoIf("SIP/08311815678-082467b0", "1?3:analog_fax|1") in new stack
-- Goto (ext-fax,in_fax,3)
-- Executing [in_fax@ext-fax:3] Macro("SIP/08311815678-082467b0", "faxreceive") in new stack
-- Executing [s@macro-faxreceive:1] Set("SIP/08311815678-082467b0", "FAXFILE=/var/spool/asterisk/fax/1252069739.13.tif") in new stack
-- Executing [s@macro-faxreceive:2] Set("SIP/08311815678-082467b0", "EMAILADDR=itmobile@perauto.com") in new stack
-- Executing [s@macro-faxreceive:3] RxFAX("SIP/08311815678-082467b0", "/var/spool/asterisk/fax/1252069739.13.tif") in new stack
-- Executing [h@ext-fax:1] System("SIP/08311815678-082467b0", "/var/lib/asterisk/bin/fax-process.pl --to itmobile@perauto.com --from itmobile@perauto.com --dest "s" --subject "Fax from 0831517004 0831517004" --attachment fax_0831517004.pdf --type application/pdf --file /var/spool/asterisk/fax/1252069739.13.tif") in new stack
-- Executing [h@ext-fax:2] Hangup("SIP/08311815678-082467b0", "") in new stack
== Spawn extension (ext-fax, h, 2) exited non-zero on 'SIP/08311815678-082467b0'

any suggestions ?

Thanks in advance.