Bases de Datos - Urgente error Jet base datos

Microsoft JET Database Engine (0x80004005)

Saludos inicio mi pregunta con ese mensaje que me da, cuando desde mi pagina web que estoy desarrollando Bajo Windows MEdia Center 2005, intenta abrir la base de datos creada en Acces,
Ok es cuestion de permisos, como normalmente se hace en windows en la carpeta de configuracion especial, pero he intentado miles de formas de darle permiso y aun asi no funciona,
tiene que ser ese windows que trajo mi computadora nueva, pues con Windows XP profesional con los mismos permisos si funciona...
Alguien podria ayudarme a confirgurar la carpeta con ese windows media cener 2005 service pack 2, que ya me tiene mal, muchas gracias a quien me pueda ayudar....

Encontre la solucion, http://support.microsoft.com/default.aspx?scid=KB;EN-US;251254 ahi explican, el caso era que la carpeta Temp o tmp, no tenia acceso concedido, para los usuarios que utiliza por defecto el iis para acceder a la pagina o en este caso a la base de datos. Lo copio aqui textual del sitio de Microsoft para que sirva de ayuda a todos. Tambien agradezco a mi Pana Angel H. por la ayuda prestada Gracias...

SYMPTOMS
When trying to connect to an Access .mdb file, an ODBC error is returned stating "Disk or Network Error". The Microsoft OLE DB Provider for the Microsoft Jet database engine may also return an "Unspecified error" (error code = 0x80004005) message.

The problem can occur only when the data source is opened under the Microsoft Internet Information Server (IIS) or a Microsoft Windows NT service but not under a logged-on user account.

CAUSE
Jet creates a temporary file when the engine is started. In doing so, it first checks the TMP environment variable and uses that path to define where the temporary file is created. If it doesn't see a TMP environment variable, it looks for the TEMP environment variable. If TEMP is not defined, it then uses the Windows folder (\WINDOWS or \WINNT).

If TMP/TEMP is defined but points to a nonexistent folder, the error occurs.

Moreover, when opening the Access database through IIS or a Windows NT service, and when IIS or the service is running under the local system account, the TMP or TEMP system environment variable is used. When the Web services or Windows NT service are started using a user account, the TMP/TEMP user profile environment variables is used.
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RESOLUTION
Define a TMP or TEMP environment variable and assign the variable to an existing folder. If you are accessing the Access database from IIS, be certain to check the system environment settings rather than environment variables of the logged-on user. Also ensure that the IUSER anonymous IIS account has access to the temporary folder.

You must restart the computer after changing any environment variables.
Environment variables are set under Windows NT 4.0 by going to the Control Panel and clicking System and then selecting the Environment tab.