[kaliff]

everytime I reboot my cisco router it looses in configuration and I have to configure it all over again each time. I just confgiured it this morning again and rebooted and everything is gone. please help

[Jay Whale]

It sounds like your configuration register setting might be wrong.
if you type 'show version' on your router, the last line should say
"Configuration register is 0x2102"

[kaliff]

it shows Configuration register is 0x2142
how do i change?

[Jay Whale]

In global config mode (conf t) type
config-register 0x2102

The config register you currently have set of 0x2142 is used when you need to perform a password recovery, this tell the router to boot without using the start-up confgiuration.