hi buddy
The mistake in ur code i think is this
<TD ALIGN=CENTER ><input type="checkbox" name="<?=$row[id]?>" id="<?=$row[id]?>" value="<?=$row[id]?>"/></TD>

Give the name as this: name="<?='checkme[]';?>" where checkme[] is the nameof the checkbox.Do not hv to assign value in the name parameter
catch the value of checkbox as $checklist = $_POST["checkme"];
Then loop it through......
for($i=0; $i<count($checklist); $i++)
{
echo "print";
$remove = $checklist[$i];
$query=mysql_query("DELETE FROM materialmaster WHERE material_code='$remove'");// Notice that i am deleting using the checkbox var $remove
}
That's it. make these changes......sure it will work.gudluck