Pomoc oko PHP forme,zadatak iz knjige nece da radi

Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<html>
<head>
    <title>Project p-7-1</title>
</head>

<body>
<form method="post"action="p-7-1">
<h1>Contact information</h1>
<table>
<tr>
    <td>Nickname:</td>
    <td><input type="text"name="nickname"></td>
</tr>
<tr>
    <td>Firstname:</td>
    <td><input type="text"name="firstname"></td>
</tr>
<tr>
    <td>Lastname:</td>
    <td><input type="text"name"lastname"></td>
</tr>
<tr>
    <td>Primary Email:</td>
    <td><input type="text"name="email"></td>
    <td width"20">&nbsp;</td>
    <td>Secondary Email:</td>
    <td><input type="text"name"secondaryemail"></td>
</tr>    

<tr>
    <td>Company name:</td>
    <td><input type="text"name="companyname"></td>
</tr>
<tr>
    <td>Office Address:</td>
    <td><input type="text"name="officeaddress"></td>
    <td width"20">&nbsp;</td>
    <td>Home Address:</td>
    <td><input type="text"name="homeaddress"></td>
</tr>
<tr>
    <td>City:</td>
    <td><input type="text"name="city"></td>
</tr>
<tr>
    <td>State</td>
    <td><input type="text"name="state"></td>
</tr>
<tr>
    <td>Zip:</td>
    <td><input type="text"name="zip"></td>
</tr>
<tr>
    <td>Phone:</td>
    <td><input type="text"name="phone"></td>
</tr>
</table>
<br>
<br>
<br>
<br>
<input type="submit"value="Submit">
<br>
<br>
<input type="reset"value="Reset">
</form>

</body>
</html>

Code:
<?php
include "p-7-1";
    function validate_form()
{
    global $nickname,$firstname,$lastname,$email;
     $errors=0;
    if(!trim($nickname))
{
    echo"<br><b>Nickname</b>is required";
    errors++;
}
    if(!trim($firstname))
{
    echo"<br><b>Firstname</b>is required";
    errors++;
}
    if(!trim($lastname))
{
    echo"<br><b>Lastname</b>is requires";
     errors++;
}
    if(!trim(email))
{
    echo"<br><b>Email</b>is required";
    $errors++;
}    switch($errors)
        {
    case 0;
        return TRUE;
        case 1;
        echo"<br><br>Please use your";
        echo"browser back button to return to";
            echo"the form,correct the errors,and";
            echo"re-submit the form";
    return FALSE;
} 
}
    function update_database()
{
    echo"<br>Updating database...";
}
$ok=validate_form();
if($ok)
    update_database();

?>

Code:
Not Found
The requested URL /index/p-7-1 was not found on this server.

Apache/1.3.33 Server at localhost Port 80

Code:
<form method="post" action="obrada.php">