Using master database instead.(severity 11) Как с этим быть?

Warning: mssql_connect() 'function.mssql-connect' message: Cannot open user default database. Using master database instead. (severity 11) in C:\Inetpub\wwwroot\index1.php
Warning: mssql_select_db() 'function.mssql-select-db' message: Could not locate entry in sysdatabases for database 'db1'. No entry found with that name. Make sure that the name is entered correctly. (severity 16) inC:\Inetpub\wwwroot\index1.php
Warning: mssql_select_db() 'function.mssql-select-db' message: Unable to select database: [db1] in C:\Inetpub\wwwroot\index1.php
Couldn't open database db1

<?php
$myServer = "serv\sqlexpress";
$myUser = "serg";
$myPass = "serg";
$myDB = "db1";
$s = mssql_connect($myServer, $myUser, $myPass)
or die("Couldn't connect to SQL Server on $myServer");
$d = mssql_select_db('['.$myDB.']', $s)
or die("Couldn't open database $myDB");
$q= "select convert(varchar(20), [date], 104) + ' ' + convert(varchar(5), [date], 8), text from soob order by id desc";
$rs= mssql_query($q);
while ($line = mssql_fetch_array($rs))
echo "$line[0]
$line[1]


";
mssql_close ($s);
?>

Причем, вначале все работало потом стала вылетать вот такая ошибка
After installing PHP it produces always 'PHP has encountered an Access
Violation at 7333F15A'

а потом вот описаное выше.