I have a BM 3.7 fp3b as a master and a BM 3.7 fp3b slave and a BM 3.6
sp1a
slave.

IP VPN connects on both slaves. IPX VPN connects on both slaves.
Then
the BM 3.7 fp3b master displays this error:

Disconnecting WAN Call VPTUNNEL@66.180.XX.XX because the remote router
is
not responding to the TIMER REQUEST packet.

Where do I start to look?

Thanks

Rick