Localhost (using xampp) connecting to a remote DB?

I've been trying to connect to a remote DB hosted elsewhere, not my my PC as localhost, but whenever I do (using the exact same password, host, etc as the live server), I get these errors:

Warning: mysql_connect() [function.mysql-connect]: Premature end of data 
(mysqlnd_wireprotocol.c:553) in C:\xampp\htdocs\Test\auth.php on line 12

Warning: mysql_connect() [function.mysql-connect]: OK packet 1 bytes shorter 
         than expected in C:\xampp\htdocs\Test\auth.php on line 12

Warning: mysql_connect() [function.mysql-connect]: mysqlnd cannot connect to 
         MySQL 4.1+ using the old insecure authentication. Please use an 
        administration tool to reset your password with the 
        command SET PASSWORD = PASSWORD('your_existing_password').

This will store a new, and more secure, hash value in mysql.user. If this user is used in other scripts executed by PHP 5.2 or earlier you might need to remove the old-passwords flag from your my.cnf file in C:\xampp\htdocs\Test\auth.php on line 12

Could not connect to host:mysqlnd cannot connect to MySQL 4.1+ using the 
old insecure authentication. Please use an administration tool to reset your
password with the command SET PASSWORD = PASSWORD('your_existing_password'). 

 This will store a new, and more secure, hash value in mysql.user. 
开发者_StackOverflow If this user is used in other scripts executed by PHP 5.2 or
 earlier you might need to remove the old-passwords flag from your my.cnf file

What am I doing wrong?

Edit: I still can't get it, I did try updating xampp.

Edit:

SELECT Length( PASSWORD( 'xyz' ) ) 

This returned 41 on my localhost and 16 on the server, so I added old_passwords=1 in my.cnf, restarted mysql so now they both equal 16. Same errors still.

Edit: Still clueless, it works for other people but not me...

Edit: Tried googling it, tried a few fixes; none worked.

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Down-grade to xampp 1.6.7 (from 1.7.4) Worked for me!