Having a problem of kernel panic

[Kamlesh Patel]

Hi all,

I am having a problem of kernel panic in FreeBSD 7.0:

In sys/boot/forth/beastie.4th
variable rebootkey
variable mykey       (added line)

After building and installing the kernel, when i reboot the system it gives me the following error: 

---------------------------------------------------
" panic: free: guard1 fail @ 0x6e104 from 
/usr/src/sys/boot/i386/loader/../../common/module.c:959

--> Press a key on the console to reboot <-- "

----------------------------------------------------

How do i recover the system from this error. I can't reload the loader.old

Could anyone please help me?