about crash debugging

[Halid Faith]

I use freebsd6.1

the server sometimes becomes crash about twice in a month.

According to freebsd handbook I did kernel debug.
I enabled dumpdev in rc.conf

after the crash  made vmcore.1 file.

I typed "kgdb kernel.debug /var/crash/vmcore.1"

I read as below
Dumping 511 MB (2 chunks)
  chunk 0: 1MB (159 pages) ... ok
  chunk 1: 511MB (130814 pages)Encountered bogus status packet
 496Encountered bogus status packet
 480Encountered bogus status packet
 464Encountered bogus status packet
Encountered bogus status packet
 448Encountered bogus status packet

Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 00
fault virtual address   = 0x7cf
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc04520bc
stack pointer           = 0x28:0xd7c7dcb4
frame pointer           = 0x28:0xd7c7dcd0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 17 (swi2: cambio)
trap number             = 12
panic: page fault
cpuid = 1
 432 416 400 384 368 352 336 320 304 288 272 256 240 224 208 192 176 160 144
128 112 96 80 64 48 32 16

#0  doadump () at pcpu.h:165
165             __asm __volatile("movl %%fs:0,%0" : "=r" (td));

Doesn't ram of the server work properly ?
Do I have to change this ram ?
Thanks