HELP!!!

I recently put an image to the header by using the code

<img src=”../web_images/Logo.jpg” border=”0″ align=”left”/>

in the header.php file under the h1.
the problem is the image shows in some pages but a broken image appears in the inner pages eg.
Donate>>sponsor>>child (these all pages are linked meaning donate is a parent of sponsor and sponsor is a parent of child)

the logo shows in the Donate and Sponsor page but is not visible in the Child page.

please tell me how can I fix it.

Thank you!