为什么我的html表单不能用我的php脚本在mysql中输入数据？

I've tried for over ten days to get this form and php script to link to the database on the server. It won't! Can anyone help?

Here's the PHP: (the server address, user name and password all work) The form is an employment application. This code only covers the top portion, I figured I'd finish the restonce I got this part working.

 <?php 
$link = mysql_connect('innovativeretailassu.ipagemysql.com', '', ''); 
if (!$link) { 
die('Could not connect: ' . mysql_error()); 



// Connect to the file above here   

if(isset($_POST['lastname'])&&isset($_POST['firstname'])&&isset($_POST['mi'] )&&isset($_POST['address'])&&isset($_POST['city'])&&isset($_POST['state'])&&isset($_POST['zipcode'])&&isset($_POST['phone'])&&isset($_POST['email'])&&isset($_POST['ssnumber'])&&isset($_POST['dob'])&&isset($_POST['securityquestion'])){
    if($_POST['lastname']!=""&&$_POST['firstname']!=""&&$_POST['mi']!=""&&$_POST['ad dress']!=""&&$_POST['city']!=""&&$_POST['state']!=""&&$_POST['zipcode']!=""&&$_POST['phone']!=""&&$_POST['email']!=""&&$_POST['ssnumber']!=""&&$_POST['dob']!=""&&$_POST['securityquestion']!=""){
        $last_name=$_POST['lastname'];
        $first_name=$_POST['firstname'];
        $mi=$_POST['mi'];
        $address=$_POST['address'];
        $apartment=$_POST['apartment'];
        $city=$_POST['city'];
        $state=$_POST['state'];
        $zip_code=$_POST['zipcode'];
        $phone=$_POST['phone'];
        $email=$_POST['email'];
        $ss_number=$_POST['ssnumber'];
        $dob=$_POST['dob'];
        $security_question=$_POST['securityquestion'];
        $sql_store="INSERT into employees(id,lastname,firstname,mi,address,apartment,city,state,zipcode,phone,email,ssnumber,dob,securityquestion) VALUES(NULL,'$lastname','$firstname','$mi','$address','$apartment','$city','$state','$zipcode','$phone','$email','$ssnumber','$dob','$securityquestion')";
        $sql=mysql_query($employees,$sql_store)or die(mysql_error());
    }else{
        echo "The top of the form must be fillied out completely.";
    }
 ?

Please, someone straighten me out on this problem. Thank You; Eric