php code

Here is a code snippet from my project
$db = mysql_pconnect('', 'name', 'pass');
$sd=  mysql_select_db("books",$db);

the first part works perfectly and it connects to the mysql
however it will not choose the database i need.

Try a test first:

@mysql_pconnect("localhost", "username", "password") or die(mysql_error());
@mysql_select_db("books") or die(mysql_error());

And see what goes wrong.