access denied root@localhost

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PHP

Hello,

I know very little about programming, means what ever learn, i learnt it from the you tube, so in order to explain my problem i am writing every thing so when i get the reply i can understand it.

first i try to download apache, mysql and phpmyadminn but did not succed.

after that i downloaded XAMPP 1.7.7

In XAMPP 1.7.7 I gave this information for my security

MYSQL SECTION: "ROOT" PASSWORD (This line was already there as a heading)

MYSQL super user : root (it was already there so i cant change)
password : bluebus
PhpMyAdmin authentification: http or cokie (i select cokie),
Safe plain password in text file? ((File: C:\xampp\security\security\mysqlrootpasswd.txt): there was a check box i did not click,

XAMPP DIRECTORY PROTECTION (.htaccess) (this line was already there as a heading)

User: bus
Password : bluebuss,
Safe plain password in text file? ((File: C:\xampp\security\security\mysqlrootpasswd.txt): there was a check box i did not click,

after that i went to phpmyadmin

user : root
password: redbus

after this i created a database, DATABASE NAME: CAR,

After this i added a new user for this database, NEW USER NAME: CAR, and password i gave again "redbus", and i created a table,

after this i created a new file in notpad++, the coding is

1. 2.
3. define ('DB_NAME', 'car');
4. define ('DB_USER', 'car');
5. define ('DB_PASSWORD', 'redbus');
6. define ('DB_HOST', 'localhost');
7. 
8. $link= mysql_connect (DB_HOST,DB_USER,DB_PASSWORD);

9. if (!$link) {
10. die ('could not connect:' . mysql_error () );
11. }
12.
13. $db_selected=mysql_selected_db (DB_NAME, $link);
14.
15. if (!$db_selected) {
16. die ('cant user' . ':' . mysql_error ());
17. }
18. 
19. $value = $_post ['input1'];
20.
21. $sql= "INSERT INTO demo (input1) VALUES ('$value')";
22.
23. if (!mysql_query ($sql)) {
24. die ('error:' . mysql_error () );
25. }
26.
27. mysql_close ();
28. ?>

when i try to run it its give me this error and i dont understand why


[Warning: mysql_connect() [function.mysql-connect]: Access denied for user 'car'@'localhost' (using password: YES) in C:\xampp\htdocs\PhpProject1\index.php on line 8
could not connect:Access denied for user 'malakiarif'@'localhost' (using password: YES)


please help me guys, i try to found out the answer by googling and wasted my whole week but could not find answer, please help me and tell me what i need to correct.

thanks