grub - Error 15: File not found

On my Centos 5.9 64 bit machine I get Error 15: File not found when try to find stage1 at grub prompt:

grub> find /boot/grub/stage1
find /boot/grub/stage1

Error 15: File not found

grub> find /grub/stage1
find /grub/stage1

Error 15: File not found

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I can see stage1 is available under /boot/grub/ directory:

# ll /boot/grub/
total 324
-rw-r--r-- 1 root root     30 Apr 23  2013 device.map
-rw-r--r-- 1 root root     63 Jun  4  2008 device.map.backup
-rw-r--r-- 1 root root  11736 Apr 23  2013 e2fs_stage1_5
-rw-r--r-- 1 root root  11512 Apr 23  2013 fat_stage1_5
-rw-r--r-- 1 root root  10744 Apr 23  2013 ffs_stage1_5
-rw------- 1 root root    325 May  1  2013 grub.conf
-rw-r--r-- 1 root root  10736 Apr 23  2013 iso9660_stage1_5
-rw-r--r-- 1 root root  12328 Apr 23  2013 jfs_stage1_5
lrwxrwxrwx 1 root root     11 Mar 21  2013 menu.lst -> ./grub.conf
-rw-r--r-- 1 root root  10968 Apr 23  2013 minix_stage1_5
-rw-r--r-- 1 root root  13360 Apr 23  2013 reiserfs_stage1_5
-rw-r--r-- 1 root root  55808 Mar 16  2009 splash.xpm.gz
-rw-r--r-- 1 root root    512 Apr 23  2013 stage1
-rw-r--r-- 1 root root 111020 Apr 23  2013 stage2
-rw-r--r-- 1 root root  11008 Apr 23  2013 ufs2_stage1_5
-rw-r--r-- 1 root root  10344 Apr 23  2013 vstafs_stage1_5
-rw-r--r-- 1 root root  12984 Apr 23  2013 xfs_stage1_5

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I will be thankful if someone can please help me find out the reason and the solution.