BR500 with can't connect PPoE behind CenturyLink's ISP Actiontec router

Hello All,

The BR500 can't be stand alone, becuase it doesn't have a DSL phone input, which means I need to connect to the CenturyLink Actiontec router.

I have two BR500's, site (A) and site (B), 

-both are connecting to CentruyLink ISP's (DSL only),

-neither one of them can connect to the ISP's Actiontec C3000 routers and authenticate w/PPoe,

-I've put the  Actiontec routers in Transparent Bridge mode (w/untagged),

-I've tried to disable the NAT in the Actiontec router,

-I've tried to enter the MAC of the Actiontec router to BR500 w/intial setup - no luck,

-No matter what I've tried I simply can't get PPoE to work w/BR500,

-the PPoE credential work w/Actiontec each time without fail, but not w/BR500

-I've gone through the PDF, I've googled for hours, I'm stuck

Is this a know issue?  Or am I missing a key how-to step here?

-please let me know if you've run into this issue.

Thanks,

-Ronald