urgent: toll free number calls can not be transferred

[Frank]

It looks like plum server problem again.

We need to transfer calls to toll free number 18004166129, but

If we call IVR number 617-xxx-xxxx, the transfer will be no problem.
If we call number 800/866-xxx-xxxx, the transfer will be problem and just prompt "nobody is answering"

800/866-xxx-xxxx are toll free numbers and we also transfer calls to toll free number 18004166129 (USA Customer Care LIVE NUMBER)

It looks like that the toll free number calls can not be transferred to another toll free number.

We have a lot of toll free IVR number and less 617-xxx-xxxx number.
This is an urgent issue, and it affect a lot of our clients

<form id="CallTransfer">
<transfer name="MyCall" dest="18004166129" bridge="true" connecttimeout="20s" transferaudio="http://www.test.com/unsubscribing.mp3">
<filled>
<if cond="MyCall == 'busy'">
<prompt>
The line is busy. Please try again later.
</prompt>
<exit/>
<elseif cond="MyCall == 'noanswer'"/>
<prompt>
Nobody is answering, sorry.
</prompt>
<elseif cond="MyCall == 'far_end_disconnect'"/>
<!--prompt>
Your party must have hung up.
</prompt-->
<elseif cond="MyCall == 'near_end_disconnect'"/>
<!--prompt>
Your called party has been disconnected.
</prompt-->
</if>
</filled>
</transfer>
</form>

[support]

US phone companies do not allow transfers to another 800 number from calls that came in on an 800 number. We've passed this thread along to our sales group and they indicated that there is an existing proposal out to your company to move to our IVR platform that does allow for 800 to 800 forwarding. We will have them get in touch with your company to check on the status of that proposal.