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my setup attached with 2 wan and 2 lan internet is working fine on both the lans but i am not able route the traffic between both the lan.also We add the route like in the knowledge base but then its not get added to the routing table sometime.I can add the route manually and works so something must be wrong.
if you say you can't seem to pass traffic back and forth from lan1 to lan2, then your problem is in PS (proxyserver). It seems to me that your ps has 2 nic, 1 is facing Lan1 and 1 is on Lan2, thus that ps has to be able to route the traffic in that passed through it.
What kind of server is it? Linux/*BSD/Windows ?
better see this
http://support.microsoft.com/kb/178993
i think Your access-list is formatted incorrectly for outbound traffic. i would remove the access-list though as traffic is implicitly permitted inside to outside.
As I expect changing the default gateway on your LAN is going to be a pain, you can simply add a secondary address on router just check for your router Then set the default route on the router to the new IP.also check dsn server.