Ip nat static rules disappears from running configuration

[m4rc00]

Hello,

I have two 2821 routers.
There are over 30 ip nat static rules. Some of them (approx in 5 days after reboot) disapper. I thought that is fault of IOS ( i found 2 bugs regarding ip nat static - previous IOS was 12.4(18)) - i change IOS to 12.4(25b) but issue still persist.
I would like to mention that only on primary router, secondary is OK (both have the same configuration). When i reboot a router everything is ok for few days.
Do you have any idea what can be wrong ? Maybe ram ? flash ?

Thank you in advance

 

[burtsbees]

post a sh ip nat trans

I would also KRON to clear ip nat trans *

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!