vista problems with ebay.

since i got a new pc with vista I have had trouble getting onto my ebay home page,I can access every other part of ebay except "MY EBAY", every other web site is ok. I then put my other pc back on but it acted the same as do the 3 laptops belonging to my daughter's, I can understand the desktops not working but not the laptops as the are wireless, i can tell you that I know slightly less than nothing about pc's and i'm stumped, i have ran virus checker's and lowered the pc's protection but nothing is helping, does anyone have any idea's?