problem with php installation

["Rama SubbaReddy" <subbareddy.smiles@xxxxxxxxx>]

Sir/madam,
           I installed apache 2.0.59 and
then I installed PHP 5.2.3 on windows 2000 ,PHP test page is coming,but
while adding extensions to acess Mysql(4.1), if I run PHP -v  at
command mode it is showing following error.

PHP Warning:  Module 'mysqli' already loaded in Unknown on line
PHP Warning:  Module 'mysql' already loaded in Unknown on line 0
PHP Warning:  Module 'mssql' already loaded in Unknown on line 0
PHP 5.2.3 (cli) (built: May 31 2007 09:37:22)
Copyright (c) 1997-2007 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies


                    Help me with this problem,

                                            with Regards,
                                                                            Subba Reddy.