and so i added the next line to php.ini:

zend_extension="Z:\wamp2\bin\php\php5.3.0\ext\php_xdebug.dll"
xdebug.remote_enable=on
xdebug.remote_handler=dbgp
xdebug.remote_host=localhost
xdebug.remote_port=9000

xdebug is definitely situated for the reason that directory with this filename

I set report_zend_debug = 0

restarted wamp, etc

but xdebug still din't appear in phpinfo....

apache error log shows the next:

PHP Warning:  PHP Startup: Unable to load dynamic library 'Z:/wamp2/bin/php/php5.3.0/ext/php_imagick_ts.dll' - The specified module could not be found.\r\n in Unknown on line 0
[Mon May 30 19:07:42 2011] [notice] Apache/2.2.11 (Win32) PHP/5.3.0 configured -- resuming normal operations
[Mon May 30 19:07:42 2011] [notice] Server built: Dec 10 2008 00:10:06
[Mon May 30 19:07:42 2011] [notice] Parent: Created child process 4260
Failed loading Z:\wamp2\bin\php\php5.3.0\ext\php_xdebug.dll
PHP Warning:  PHP Startup: Unable to load dynamic library 'Z:/wamp2/bin/php/php5.3.0/ext/php_imagick_ts.dll' - The specified module could not be found.\r\n in Unknown on line 0
<br />
<b>Warning</b>:  PHP Startup: Unable to load dynamic library 'Z:/wamp2/bin/php/php5.3.0/ext/php_imagick_ts.dll' - The specified module could not be found.
 in <b>Unknown</b> on line <b>0</b><br />
[Mon May 30 19:07:43 2011] [notice] Child 4260: Child process is running
[Mon May 30 19:07:43 2011] [notice] Child 4260: Acquired the start mutex.
[Mon May 30 19:07:43 2011] [notice] Child 4260: Starting 64 worker threads.
[Mon May 30 19:07:43 2011] [notice] Child 4260: Starting thread to listen on port 80.

PHP is version 5.3.

got the Xdebug 2.1.1 PHP 5.3 VC9 (32 bit) version

If you work with PHP being an Apache module, you will have to get xdebug TS (Thread Safe). If you work with PHP like a CGI process, you will have to get xdebug (NTS - Not Thread Safe).

You must also match the develops:

PHP 5.3 VC6 will need xdebug VC6

PHP 5.3 VC9 will need xdebug VC9

Observe that your PHP version 5.3. is extremely old, may have outdated API calls, and it is generally unstable / filled with bugs. Obtain the latest version: 5.3.6. Or make use of a wamp package that accompany an identical xdebug version automatically.

Listed here are the lines in mine that when uncommened will load xdebug:

[XDebug]
zend_extension = "D:\WampDeveloper\Components\Php\ext\php_xdebug.dll"
xdebug.profiler_enable = 1
xdebug.profiler_output_name = cachegrind.out.%t.%p
xdebug.profiler_output_dir = "D:/WampDeveloper/Temp/xdebug"
xdebug.trace_output_dir = "D:/WampDeveloper/Temp/xdebug"