yes Thanks for your reply....nw inserted the usbcore module...after that i 
didnt any message in "dmesg"...even though am getting same error....when i use 
"modprobe" am getting the below error  :
shar...@sharief-desktop:~$ modprobe ehci-hcd
FATAL: Module ehci_hcd not found.



--- On Fri, 26/12/08, Thomas Petazzoni <[email protected]> 
wrote:
From: Thomas Petazzoni <[email protected]>
Subject: Re: Unknown symbols...
To: [email protected]
Date: Friday, 26 December, 2008, 6:03 PM

Le Fri, 26 Dec 2008 15:26:44 +0530 (IST),
niamathullah sharief <[email protected]> a écrit :

> Hello...when i try to insert "ehci-hcd" with insmod i am getting
this
> errorr...@sharief-desktop:/home/sharief/Desktop/drivers/host# insmod
> ehci-hcd.ko insmod: error inserting 'ehci-hcd.ko': -1 Unknown
symbol
> in moduleoutput of  "dmesg" is 

> :[  196.416023] ehci_hcd: Unknown symbol usb_hcd_pci_suspend

In module usbcore.

> [  196.416023] ehci_hcd: Unknown symbol usb_free_urb

In module usbcore.

...

> Kindly help me what to do...

Use modprobe instead of insmod. modprobe will automatically load the
required dependencies.

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers and embedded Linux development,
consulting, training and support.
http://free-electrons.com

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