Fax Machine Can't Receive Faxes

I am not sure what I am doing wrong and have read through a number of post trying to figure this one out. I have an analog fax machine hooked up to an ATA. It sends faxes with out a problem, but when it comes to receiving, it doesn't get a single one. I am running trixbox 2.6.2.3. In the General Settings I have the 'Extension of fax machine for receiving faxes' set to system. In the Inbound route setup I selected the fax extension and 'Fax Detection Type' is set to NVFax. The machine always answers but no fax comes through. Below is what comes up in the CLI. Any help would be greatly appreciated.

Connected to Asterisk 1.4.22-4 RPM by vc-rpms@voipconsulting.nl currently runnin
Verbosity is at least 3
-- Executing [xxxxxxxxxxx@from-sip-external:1] NoOp("SIP/xxx.xxx.xxx.xxx-090f1100", "Received incoming SIP connection from unknown peer to xxxxxxxxxxx") in new stack
-- Executing [xxxxxxxxxxx@from-sip-external:2] Set("SIP/xxx.xxx.xxx.xxx-090f1100", "DID=xxxxxxxxxxx") in new stack
-- Executing [xxxxxxxxxxx@from-sip-external:3] Goto("SIP/xxx.xxx.xxx.xxx-090f1100", "s|1") in new stack
-- Goto (from-sip-external,s,1)
-- Executing [s@from-sip-external:1] GotoIf("SIP/xxx.xxx.xxx.xxx-090f1100", "1?from-trunk|xxxxxxxxxxx|1") in new stack
-- Goto (from-trunk,xxxxxxxxxxx,1)
-- Executing [xxxxxxxxxxx@from-trunk:1] Set("SIP/xxx.xxx.xxx.xxx-090f1100", "__FROM_DID=xxxxxxxxxxx") in new stack
-- Executing [xxxxxxxxxxx@from-trunk:2] Gosub("SIP/xxx.xxx.xxx.xxx-090f1100", "app-blacklist-check|s|1") in new stack
-- Executing [s@app-blacklist-check:1] LookupBlacklist("SIP/xxx.xxx.xxx.xxx-090f1100", "") in new stack
-- Executing [s@app-blacklist-check:2] GotoIf("SIP/xxx.xxx.xxx.xxx-090f1100", "0?blacklisted") in new stack
-- Executing [s@app-blacklist-check:3] Return("SIP/xxx.xxx.xxx.xxx-090f1100", "") in new stack
-- Executing [xxxxxxxxxxx@from-trunk:3] ExecIf("SIP/xxx.xxx.xxx.xxx-090f1100", "0 |Set|CALLERID(name)=5167922409") in new stack
-- Executing [xxxxxxxxxxx@from-trunk:4] Set("SIP/xxx.xxx.xxx.xxx-090f1100", "FAX_RX=152") in new stack
-- Executing [xxxxxxxxxxx@from-trunk:5] Answer("SIP/xxx.xxx.xxx.xxx-090f1100", "") in new stack
-- Executing [xxxxxxxxxxx@from-trunk:6] PlayTones("SIP/xxx.xxx.xxx.xxx-090f1100", "ring") in new stack
-- Executing [xxxxxxxxxxx@from-trunk:7] NVFaxDetect("SIP/xxx.xxx.xxx.xxx-090f1100", "0|t") in new stack
-- Executing [fax@from-trunk:1] Goto("SIP/xxx.xxx.xxx.xxx-090f1100", "ext-fax|in_fax|1") in new stack
-- Goto (ext-fax,in_fax,1)
-- Executing [in_fax@ext-fax:1] StopPlayTones("SIP/xxx.xxx.xxx.xxx-090f1100", "") in new stack
-- Executing [in_fax@ext-fax:2] GotoIf("SIP/xxx.xxx.xxx.xxx-090f1100", "0?3:analog_fax|1") in new stack
-- Goto (ext-fax,analog_fax,1)
-- Executing [analog_fax@ext-fax:1] GotoIf("SIP/xxx.xxx.xxx.xxx-090f1100", "0?4:2") in new stack
-- Goto (ext-fax,analog_fax,2)
-- Executing [analog_fax@ext-fax:2] Set("SIP/xxx.xxx.xxx.xxx-090f1100", "DIAL=SIP/152") in new stack
-- Executing [analog_fax@ext-fax:3] Dial("SIP/xxx.xxx.xxx.xxx-090f1100", "SIP/152|20|d") in new stack
-- Called 152
-- SIP/152-090b2d88 is ringing
-- SIP/152-090b2d88 answered SIP/xxx.xxx.xxx.xxx-090f1100
== Spawn extension (ext-fax, analog_fax, 3) exited non-zero on 'SIP/xxx.xxx.xxx.xxx-090f1100'
-- Executing [h@ext-fax:1] System("SIP/xxx.xxx.xxx.xxx-090f1100", "/var/lib/asterisk/bin/fax-process.pl --to --from freepbx@gmail.com --dest "xxxxxxxxxxx" --subject "Fax from 5167922409 PLYMOUTH%2cENERGY" --attachment fax_5167922409.pdf --type application/pdf --file ") in new stack
-- Executing [h@ext-fax:2] Hangup("SIP/xxx.xxx.xxx.xxx-090f1100", "") in new stack
== Spawn extension (ext-fax, h, 2) exited non-zero on 'SIP/xxx.xxx.xxx.xxx-090f1100'