No consigo hacer funcionar un w2000 con w2003

Hola Grupo

En una red donde el DC principal es un W2003 y luego he promocionado un
W2000 ("aparentemente" bien). Digo lo de aparentemente porque a la hora de
hacerle un dcdiag al 2000 o intentar instalar un isa server 2000 sobre el
DCW2000 he visto los problemas.

En primer lugar esoty intentando despromocionar el W2000 y no hay manera
dice que no tiene conexion con el domino existente. Pregunta ¿como quitar
un DC del AD cuando no hay conexión?

Os mando copia del reporte del dcdiag echo en el w2000 por si me podeis
"abrir los ojos"

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Domain Controller Diagnosis

Performing initial setup:
Done gathering initial info.

Doing initial required tests

Testing server: <nombre-dominio>\DC-W2000 Starting test:
Connectivity
. DC-W2000 passed test Connectivity

Doing primary tests

Testing server: <nombre-dominio>\DC-W2000 Starting test:
Replications
[DC1-W2003] DsBind() failed with error 1722,
El servidor RPC no está disponible..
. DC-W2000 passed test Replications
Starting test: NCSecDesc
. DC-W2000 passed test NCSecDesc
Starting test: NetLogons
. DC-W2000 passed test NetLogons
Starting test: Advertising
. DC-W2000passed test Advertising
Starting test: KnowsOfRoleHolders
Warning: DC1-W2003 is the Schema Owner, but is not responding to
DS RPC Bind.
[DC1-W2003] LDAP connection failed with error 58,
El servidor especificado no puede ejecutar la operación
solicitada..
Warning: DC1-W2003 is the Schema Owner, but is not responding to
LDAP Bind.
Warning: DC1-W2003 is the Domain Owner, but is not responding to
DS RPC Bind.
Warning: DC1-W2003 is the Domain Owner, but is not responding to
LDAP Bind.
Warning: DC1-W2003 is the PDC Owner, but is not responding to DS
RPC Bind.
Warning: DC1-W2003 is the PDC Owner, but is not responding to LDAP
Bind.
Warning: DC1-W2003 is the Rid Owner, but is not responding to DS
RPC Bind.
Warning: DC1-W2003 is the Rid Owner, but is not responding to LDAP
Bind.
Warning: DC1-W2003 is the Infrastructure Update Owner, but is not
responding to DS RPC Bind.
Warning: DC1-W2003 is the Infrastructure Update Owner, but is not
responding to LDAP Bind.
. DC-W2000 failed test KnowsOfRoleHolders
Starting test: RidManager
. DC-W2000 passed test RidManager
Starting test: MachineAccount
. DC-W2000 passed test MachineAccount
Starting test: Services
. DC-W2000 passed test Services
Starting test: ObjectsReplicated
. DC-W2000passed test ObjectsReplicated
Starting test: frssysvol
. DC-W2000 passed test frssysvol
Starting test: kccevent
. DC-W2000 passed test kccevent
Starting test: systemlog
. DC-W2000 passed test systemlog

Running enterprise tests on : <nombre-dominio> Starting test:
Intersite
. Seminario.es passed test Intersite
Starting test: FsmoCheck
Warning: DcGetDcName(GC_SERVER_REQUIRED) call failed, error 1355
A Global Catalog Server could not be located - All GC's are down.
Warning: DcGetDcName(PDC_REQUIRED) call failed, error 1355
A Primary Domain Controller could not be located.
The server holding the PDC role is down.
. <nombre-dominio> failed test FsmoCheck
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