External Hard Drive I/O Error

Hello
I Have a seagate external hard drive.
In some folders I cant access the folder and when I click on folder windows prompts:
"the request could not be performed because of an i/o device error"
I tested my hard drive on several computers with windows xp and 7 and the problem didn't solved.
but when I use Mini windows on Hiren boot cd, there is no problem.
please guide me.
thank you