Downstream PBX Failover Rollover Hunting

I had this working on my Asterisk box nicely, now I am trying to replicate it on MTE. Basically a service I like to offer (and is a great selling point) is that is a customers extensions or CPE PBX in unreachable due to down internet connection on their side the MTE would then try another couple numbers (like a cell phone or POTS line)

What I had in Asterisk was an include that looked like this:

;; Business Number ------------------------------------------------------------------------->>>>
exten => 4135553328,1,Set(__FROM_DID=${EXTEN})
exten => 4135553328,n,ExecIf($[ "${CALLERID(name)}" = "" ] ,Set,CALLERID(name)=${CALLERID(num)})
exten => 4135553328,n,Set(FAX_RX=)
exten => 4135553328,n,Set(__CALLINGPRES_SV=${CALLINGPRES_${CALLINGPRES}})
exten => 4135553328,n,SetCallerPres(allowed_not_screened)
; Main Route
exten => 4135553328,n,Set(CDR(accountcode)=CP-01257)
exten => 4135553328,n,RetryDial(silence,2,4,SIP/4135553328/${EXTEN},60)
; Failover Routes
exten => 4135553328,n,Goto(from-internal,14135554349,1)
exten => 4135553328,n,Goto(from-internal,14135550438,1)

and I had one for each DID (I know I could have used variables but I had scripts automating this process)

What I did in MTE was create the following script:

exten => s,1,Set(CALLERID(name)=${ARG2}${CALLERID(name)})
exten => s,n,Goto(local-extensions${TL_DASH}${tenant},${ARG1},1)
exten => s,n,Goto(local-extensions${TL_DASH}${tenant},${ARG3},20)
exten => s,n,Goto(local-extensions${TL_DASH}${tenant},${ARG4},20)
exten => s,n,Goto(local-extensions${TL_DASH}${tenant},${ARG5},20)

ARG3 4 & 5 are Failover 1 2 & 3 respectively

I then disconnect the trunk on the CPE PBX and try to call it. But what I get is a Busy signal and no attempts to outdial to the first, second, or third failover number.

Any help would be great! This is a great service. I even had a customer where they were digging up the street and snapped all the lines in the ground, electric and phone and internet. but without hesitation the calls routed to their cell phones. They called and told me what happened and could not praise the VoIP service enough. 3 days later when their services came back their calls just magically started ringing in the office again!!

-Adam