FastCGIModule error 500

[Ernesto]

Hi, we have a server with Windows Server 2008 Wed Ed. 64 bits and Plesk 9.3 for Windows.

We receive this error from time to time when acces to the Plesk Panel:

---------------------------------------

Error HTTP 500.0 - Internal Server Error
C:\Program Files (x86)\Parallels\Plesk\admin\bin\php-cgi.exe - El proceso FastCGI se canceló de manera inesperada
Información de error detallada
Módulo FastCgiModule
Notificación ExecuteRequestHandler
Controlador Plesk_Handler_019304925
Código de error 0x00000003
Dirección URL solicitada https://localhost:8443/index.php
Ruta de acceso física C:\Program Files (x86)\Parallels\Plesk\admin\htdocs\index.php
--------------------------------------------------------

(sorry but the server is in spanish)

We see this error sometimes when login to plesk and sometimes when we are working inside the panel. Normally we wait for 30-60 seconds and update with F5 and then run normally.

In event log we don't see anything related to this error.

Someone know something about this?

Thanks.