entering control panel problem

hello. first. thanks for the other topic. you really helped me.
second here is the problem:
when i enter my control panel, it displays the page and when it finish loading the page it shows me a blank page.
i’m using all of my browsers and it does the same thing, but in other computers it works fine. what can i do?
i’m using Hebrew edition of WP and it’s 2.8.6
the browsers: Google Chrome, Internet Explorer 6+7 and Mozila Firefox

sorry for misspelling, i’m from Israel