tr class probleem

<link href="style.css" rel="stylesheet" type="text/css">
<table width="100%">
<?php
include('config.php');
$query=mysql_query("SELECT*FROM knieuws");
while($nieuws=mysql_fetch_assoc($query)){
?>
<tr class="row1"><td  width="75%" align="left"><?=$nieuws['titel'] ?></td><td width="25%" align="right"><?=$nieuws['datum'] ?></td></tr>
<tr ><td colspan="2"><?=$nieuws['memo'] ?></td></tr>



<?php
}
?>
</table>

<link href="style.css" rel="stylesheet" type="text/css">
<table width="100%">
<?php
include('config.php');
$query=mysql_query("SELECT*FROM knieuws");
while($nieuws=mysql_fetch_assoc($query)){
?>
<tr class="row1"><td  width="75%" align="left"><?=$nieuws['titel'] ?></td><td width="25%" align="right"><?=$nieuws['datum'] ?></td></tr>
<tr ><td colspan="2"><?=$nieuws['memo'] ?></td></tr>
 
 
 
<?php
}
?>
</table>

table{
	padding: 0px;
	border: 0px;
	font-family: Verdana, Arial, Helvetica, sans-serif;
	margin: 0px;
	font-size: 9pt;
	}
tr.row1{
	border-bottom-style:dashed;
	border-width: 1px;
	border-right-style:solid;
	border-left-style:solid;
	border-top-style:solid;
	border-color:#999999;
	}

table{
	padding: 0px;
	border: 0px;
	font-family: Verdana, Arial, Helvetica, sans-serif;
	margin: 0px;
	font-size: 9pt;
	}
tr.row1{
	border-bottom-style:dashed;
	border-width: 1px;
	border-right-style:solid;
	border-left-style:solid;
	border-top-style:solid;
	border-color:#999999;
	}

<tr style="border-bottom-style:dashed; 
  border-width: 1px    
  border-right-style:solid;
  border-left-style:solid;
  border-top-style:solid;
  border-color:#999999;">

<tr style="border-bottom-style:dashed; 
  border-width: 1px    
  border-right-style:solid;
  border-left-style:solid;
  border-top-style:solid;
  border-color:#999999;">