Error en isa server de la urlcache

Buenas tardes grupo tengo el siguiente error en mi servidor de isa server.
ya le he colocado los service pack de microsoft correspondientes y volvi a
crear la cache y nada me sigue saliendo este error que mas puedo hacer
gracias de antemano

El Service Pack:

ISA2000-KB888258-X86-ENU.exe



El Error:

Disk cache D:\urlcache\Dir1.cdat failed to

initialize. Some errors were encountered when

ISA Server restored specific data cache files.

ISA Server will now attempt to recover these files.

These errors may have occurred because there was not

enough time to complete all necessary shutdown operations,

when ISA Server was previously shut down. To avoid this in

future, you can increase the value of

the
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\WaitToKillServiceTimeout
registry key.

Identify the reason for cache failure by examining previous recorded
events, or the error code.

The error code in the Data area of the event properties indicates the cause
of the failure (internal code: 503.6333.3.0.1200.50).





error 14176 web proxy