Using DD-WRT I ended up in a situation with constant disconnects.  Couldn't get much from DD-WRT even with using syslogd to forward to my server for review, however windows provided the following from event viewer that let me to believe it was something with the DHCP configuration on my second DD-WRT router:

Your computer was not assigned an address from the network (by the DHCP Server) for the Network Card with network address 0x6A5D65CF441C.  The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server.

The IP address lease 192.168.0.101 for the Network Card with network address 0x14DAE82995B5 has been denied by the DHCP server 192.168.0.1 (The DHCP Server sent a DHCPNACK message).

Nack is received in the adapter 13

The IP address lease 192.168.0.23 for the Network Card with network address 0x14DAE82995B5 has been denied by the DHCP server 192.168.0.2 (The DHCP Server sent a DHCPNACK message).

Either disable DHCP in the DD-WRT setup menu or setup the second router as a forwarder.  In my case I could not get to the setup menu so I had to reset my router and reenter the settings manually.  That did the trick.  

Cheers,
TK