Could someone please answer a stupid question...

I have the following bare-bones kernel module...
------------------------------------------------------
#ifndef __KERNEL__
#define __KERNEL__
#define MODULE
#include <linux/module.h>

int init_module(void)
{
    printk("<1>Hello, World\n");
    return 0;
}

void cleanup_module(void)
{
    printk("<1>I'm outta here...\n");
}

#endif
------------------------------------------------------

I compile with...

[blah@localhost blah] gcc -O2 -Wall -D__KERNEL__ -DMODULE
-I/usr/src/linux/include/ -c blah.c

So far no problems.  I should point out that this module is intended
for another system, and the sources at /usr/src/linux match that of
the target.  When I move blah.o to the other system, I get this...

bash-2.05# /sbin/insmod blah.o
blah.o: couldn't find the kernel version the module was compiled for

Sure... let's try that again...

bash-2.05# /sbin/insmod -f blah.o
blah.o: couldn't find the kernel version the module was compiled for

Could someone shed some light??  TIA