Cisco VPN :: ASA 5505 VPN Concentrator To Maintain Connection With Remote Sites

I have been working with my ASA 5505 VPN Concentrator to maintain a connection with one of my remote sites.  I have several tunnels that work fine and dont have any issues at all, but one tunnel with outside IP ending in 146 and inside LAN 192.168.3.0 goes down every 24 hours.  Attached is the config from the concentrator.  I changed around the Security Association Lifetime Settings and the tunnel would drop after that amount of time expired.  If I set it to 24 hours, the tunnel would drop every 24 hours.  If I set it to 8 hours it would go down every 8 hours.
 
I have swapped the router a few times, double and triple checked my key settings, disabled keep alives on both ends, and this problem just started happening a few weeks ago after working fine for years.  I also get the following e-mail error every time it goes down:

<161>Jul 10 2011 16:19:47: %ASA-1-713900: Group = xxx.xxx.xxx.146, IP = xxx.xxx.xxx.146, construct_ipsec_delete(): No SPI to identify Phase 2 SA!