gdbm compatibility between linux and freebsd

[bucket79]

here's a problem
A is redhatlinux and B is freebsd
 
A)
$uname -a 
Linux xxxxxxxxx 2.4.7-10 #1 Thu Sep 6 17:27:27 EDT 2001 i686 unknown

$python -V
Python 2.2.2

$ldd /usr/local/lib/python2.2/lib-dynload/gdbm.so
 libgdbm.so.2 => /usr/lib/libgdbm.so.2 (0x4000a000)
 libc.so.6 => /lib/i686/libc.so.6 (0x40011000)
 /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)

B)
$uname -a 
FreeBSD xxx.xxx.xxx 5.1-CURRENT FreeBSD 5.1-CURRENT #0: Mon Aug 18
11:34:38 KST 2003  xxxxxxxxxxxxxxxxxxxxxx i386

$python -V
Python 2.2.3

$ldd /usr/local/lib/python2.2/site-packages/gdbm.so
 libc_r.so.5 => /usr/lib/libkse.so.1 (0x2815e000)
 libgdbm.so.3 => /usr/local/lib/libgdbm.so.3 (0x28180000)

and the problem is gdbm db file is not compatible between two system
for example
in system A)
>>import gdbm
>>f = gdbm.open("test.db", "c")
>>f["1"] = "first"
>>f.close()
and copy this file to freebsd system and try to open this file then it
fails !!
like this
in system B)
>>import gdbm
>>f = gdbm.open("test.db", "r")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
gdbm.error: File read error

and reverse case is also fails. more precisely say in this case python
occurs gdbm FATAL error :(

anyone know what is the casuse of this problem?