Solucionado error en version php del wamp

[alexkof158]

hola y saludos...
bueno amigos, estoy mamado llevo 1 dia sin poder estudiar ya que mi servidor php no funciona siendo que cuando ejecuto un proyecto ejemplo : login al validar usuario me sale un mensaje del browser que la conexion ha sido reiniciada.. no se pork??
viendo los logs de errores del wampserver 2.0 me salio esto

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on line 31, referer: http://localhost/prueba/registrar.php
[Wed Nov 11 16:24:25 2009] [notice] Parent: child process exited with status 3221225477 -- Restarting.
[Wed Nov 11 16:24:26 2009] [notice] Apache/2.2.11 (Win32) PHP/5.3.0 configured -- resuming normal operations
[Wed Nov 11 16:24:26 2009] [notice] Server built: Dec 10 2008 00:10:06
[Wed Nov 11 16:24:26 2009] [notice] Parent: Created child process 3372
[Wed Nov 11 16:24:26 2009] [notice] Child 3372: Child process is running
[Wed Nov 11 16:24:26 2009] [notice] Child 3372: Acquired the start mutex.
[Wed Nov 11 16:24:26 2009] [notice] Child 3372: Starting 64 worker threads.
[Wed Nov 11 16:24:26 2009] [notice] Child 3372: Starting thread to listen on port 80.
[Wed Nov 11 16:27:40 2009] [notice] Parent: Received shutdown signal -- Shutting down the server.
[Wed Nov 11 16:27:40 2009] [notice] Child 3372: Exit event signaled. Child process is ending.
[Wed Nov 11 16:27:41 2009] [notice] Child 3372: Released the start mutex
[Wed Nov 11 16:27:42 2009] [notice] Child 3372: All worker threads have exited.
[Wed Nov 11 16:27:42 2009] [notice] Child 3372: Child process is exiting
[Wed Nov 11 16:27:43 2009] [notice] Parent: Child process exited successfully.
[Wed Nov 11 16:27:54 2009] [notice] Apache/2.2.11 (Win32) PHP/5.3.0 configured -- resuming normal operations
[Wed Nov 11 16:27:54 2009] [notice] Server built: Dec 10 2008 00:10:06
[Wed Nov 11 16:27:54 2009] [notice] Parent: Created child process 3172
[Wed Nov 11 16:27:55 2009] [notice] Child 3172: Child process is running
[Wed Nov 11 16:27:55 2009] [notice] Child 3172: Acquired the start mutex.
[Wed Nov 11 16:27:55 2009] [notice] Child 3172: Starting 64 worker threads.
[Wed Nov 11 16:27:55 2009] [notice] Child 3172: Starting thread to listen on port 80.
[Wed Nov 11 16:28:03 2009] [error] [client 127.0.0.1] PHP Notice:  Undefined variable: usuario in C:\\wamp\\www\\tallerphp\\validar_usuario.php on line 20, referer: http://localhost/tallerphp/login.php
[Wed Nov 11 16:28:09 2009] [notice] Parent: child process exited with status 3221225477 -- Restarting.
[Wed Nov 11 16:28:09 2009] [notice] Apache/2.2.11 (Win32) PHP/5.3.0 configured -- resuming normal operations
[Wed Nov 11 16:28:09 2009] [notice] Server built: Dec 10 2008 00:10:06
[Wed Nov 11 16:28:09 2009] [notice] Parent: Created child process 3564
[Wed Nov 11 16:28:09 2009] [notice] Child 3564: Child process is running
[Wed Nov 11 16:28:09 2009] [notice] Child 3564: Acquired the start mutex.
[Wed Nov 11 16:28:09 2009] [notice] Child 3564: Starting 64 worker threads.
[Wed Nov 11 16:28:09 2009] [notice] Child 3564: Starting thread to listen on port 80.
[Wed Nov 11 16:28:34 2009] [notice] Parent: Received shutdown signal -- Shutting down the server.
[Wed Nov 11 16:28:34 2009] [notice] Child 3564: Exit event signaled. Child process is ending.
[Wed Nov 11 16:28:35 2009] [notice] Child 3564: Released the start mutex
[Wed Nov 11 16:28:36 2009] [notice] Child 3564: All worker threads have exited.
[Wed Nov 11 16:28:36 2009] [notice] Child 3564: Child process is exiting
[Wed Nov 11 16:28:36 2009] [notice] Parent: Child process exited successfully.
[Wed Nov 11 16:28:37 2009] [notice] Apache/2.2.11 (Win32) PHP/5.3.0 configured -- resuming normal operations
[Wed Nov 11 16:28:37 2009] [notice] Server built: Dec 10 2008 00:10:06
[Wed Nov 11 16:28:37 2009] [notice] Parent: Created child process 2340
[Wed Nov 11 16:28:37 2009] [notice] Child 2340: Child process is running
[Wed Nov 11 16:28:37 2009] [notice] Child 2340: Acquired the start mutex.
[Wed Nov 11 16:28:37 2009] [notice] Child 2340: Starting 64 worker threads.
[Wed Nov 11 16:28:37 2009] [notice] Child 2340: Starting thread to listen on port 80.
[Wed Nov 11 16:30:03 2009] [error] [client 127.0.0.1] PHP Notice:  Undefined variable: usuario in C:\\wamp\\www\\tallerphp\\validar_usuario.php on line 20, referer: http://localhost/tallerphp/login.php
[Wed Nov 11 16:30:04 2009] [notice] Parent: child process exited with status 3221225477 -- Restarting.
[Wed Nov 11 16:30:04 2009] [notice] Apache/2.2.11 (Win32) PHP/5.3.0 configured -- resuming normal operations
[Wed Nov 11 16:30:04 2009] [notice] Server built: Dec 10 2008 00:10:06
[Wed Nov 11 16:30:04 2009] [notice] Parent: Created child process 1292
[Wed Nov 11 16:30:04 2009] [notice] Child 1292: Child process is running
[Wed Nov 11 16:30:04 2009] [notice] Child 1292: Acquired the start mutex.
[Wed Nov 11 16:30:04 2009] [notice] Child 1292: Starting 64 worker threads.
[Wed Nov 11 16:30:04 2009] [notice] Child 1292: Starting thread to listen on port 80.