Blur effect only works on top ( first element ) element only

[insaurabh]

// suppose this is first element
//I want to blur image
// targeted class is someClass

<td width="" class="someClass"  align="left" valign="top">
<a href="#'>
<img src="images/blank_img.jpg"  />
</a>
</td>

// second td
// it is not blurred

<td width="" class="someClass"  align="left" valign="top">
<a href="#'>
<img src="images/blank_img.jpg"  />
</a>
</td>

// td is populated using php loop
I tried find method still don`t worked