I have a KX-TA824 with the 3 co 8 extension expansion card installed. I have four extensions connect (1,2,3,4)

The caller id is working fine on CO lines 1-3 but not 4-6. As if the expansion card is not passing the caller id info to the extensions on the main board.

All CO's are configured for caller id, only the CO's on the main board is passing the caller id info to the extensions (also on the main board)

Any thoughts? Thank you!