External module: insmod load error - Android Q&A, Help & Troubleshooting

Hi,
I am trying to load a kernel module into my Android phone (HTC Ion, GDP2). The phone has a cyanogenmod rom with the kernel version 2.6.34.5-cyanogenmod .. shade at oxygene #2.
I am able to successfully cross-compile the LKM (a simple helloworld module) on my Ubuntu machine for the supersonic-2.6.34 kernel obtained from the cyanogen git repository. During make ARCH=arm and CROSSCOMPILE=<my-toolchain-path>/arm-eabi-4.2.1/bin/arm-eabi- menuconfig
I have enabled the loading of external modules and made sure than the version string of the kernel looks exactly the same as that of the phone-kernel (to avoid version match problem during insmod).
However, after I copy my helloworld.ko to /sdcard and try to insmod from there (i do have root privileges of course) I get the following error:
insmod: init_module 'helloworld.ko' failed (No such file or directory)
After dmesg:
<4>[54107.816314] select 1060 (ndroid.settings), adj 7, size 3942, to kill
<4>[54107.816741] send sigkill to 1060 (ndroid.settings), adj 7, size 3942
<4>[54112.699005] select 970 (android.browser), adj 8, size 7407, to kill
<4>[54112.699279] send sigkill to 970 (android.browser), adj 8, size 7407
<7>[54116.056854] tiwlan0: no IPv6 routers present
<6>[54181.677948] request_suspend_state: sleep (0->3) at 54123617131664 (2010-11-21 18:46:53.796054520 UTC)
<7>[54181.692169] deinit sharp panel
<7>[54182.325012] save exit: isCheckpointed 1
<4>[54657.268341] helloworld: Unknown symbol mcount
I am not able to understand the reason behind this. Can somebody help me out?
Thanks in advance!
Hrushi
For your reference following is the LKM code:
#include <linux/init.h>
#include <linux/module.h>
MODULE_LICENSE("Dual DSD/GPL");
static int hello_init(void){
printk(KERN_ALERT "Hello, world\n");
return 0;
}
static void hello_exit(void){
printk(KERN_ALERT "Goodbye, cruel world\n");
}
module_init(hello_init);
module_exit(hello_exit);