While creating USB flash drive using Ubuntu11.04 live CD received error message

Hi Experts,
While creating USB flash drive using Ubuntu 11.04 live CD I received an error message. I was directed step by step from the site
https://help.ubuntu.com/community/Installation/FromUSBStick
On completion of 29% I received the error message. Have a look at the error message. “An uncaught exception was raised:”. If you have any idea regarding this problem please help me.
Thanks in advance.
![An uncaught exception was raised: [Error 5] Input/output error](https://www.techyv.com/sites/default/filesx/users/Images/Installation-Failed-An-uncaught-exception-was-raised-Error-5-Input-output-error.jpeg)
Installation Failed
An uncaught exception was raised:
[Error 5] Input/output error
Quit
