Begin To Dump Crashinfo To Flash....

i have a cisco pix515e firewall i bought from ebay. for some reason everytime i make changes using the ASDM panel, it will always do this rebooting and it gives me a message the says

Begin to dump crashinfo to flash....
End of console dump.
Do 'show crashinfo' after reboot to retrieve other crash information

CISCO SYSTEMS PIX FIREWALL
Embedded BIOS Version 4.3.207 01/02/02 16:12:22.73

what can i do. why am i seeing this problem.? at first i thought it was a problem with a quad nic that i had installed, but i removed it and it still reboots and it crashes..

dont know what to do