sembra che non scrivi niente prima, come è possibile che non si riesca a collegare al database?? comunque i record della tabella sul database li incrementa??
ecco il codice della pagina:

<html>
<head>
<title>Newsletter</title>
<style type=text/css>
.input{

FONT-SIZE: 10px; COLOR: black; FONT-FAMILY: Verdana, Arial, Helvetica, sans-serif;
border-width : 1;
border-color : #333333;
background : #FFFFFF;
scrollbar-base-color:#99CCCC;
}

select{
FONT-SIZE: 10px; COLOR: black; FONT-FAMILY: Verdana, Arial, Helvetica, sans-serif;
border-width : 1;
border-color : #333333;
background : #FFFFFF;
scrollbar-base-color:#666666;
}

.bottone{
FONT-SIZE: 10px; COLOR: #black; FONT-FAMILY: Verdana, Arial, Helvetica, sans-serif;
border-width : 1;
border-color : #999999;
background : #FFFFFF;
}

form{
margin-top: 0px;
margin-bottom: 0px;
}

</style>
</head>
<body>
<center><table border=1 bgcolor=#FFFFFF cellspacing=0 cellpadding=0 bordercolor=#000000 width=600>
<td>
<table border=1 cellspacing=0 cellpadding=2 bgcolor=#99CCCC bordercolor=#FFFFFF width=600>
<td width=550><font face=verdana size=2>Pannello amministrazione</td>
</table></td></table>

Warning: Cannot modify header information - headers already sent by (output started at /home/mhd-01/www.tavillago.it/htdocs/newsletter/header.php:4) in /home/mhd-01/www.tavillago.it/htdocs/newsletter/admin.php on line 47




<table border=1 bgcolor=#FFFFFF cellspacing=0 cellpadding=2 bordercolor=#000000 width=150>
<td><form action=/newsletter/admin.php method=post>
<table border=0 cellspacing=0 cellpadding=0 bgcolor=#99CCCC bordercolor=#FFFFFF width=150>
<td><font size=1 face=verdana>User:</td>
<td><input type=text name=user class=input size=15></td>
<tr>
<td><font size=1 face=verdana>Pasword:
</td>
<td><input type=password name=pwd class=input size=15>
<input type=submit name=submit1 class=bottone value=Login></td>
</table></td></table></form>

Indietro
</body>
</html>