Application Center urgent

Friends Good Late!     I am with problem in the Application Center. We have

two machines in NLB of Application Center that possess applications
published 
in registered IIS and DLL in the COM+. When we made update in node main
and 
synchronize, the application continued functioning in this node main and
in 
the other he stopped to function, I had that to disactivate the NLB in
node 
secundario not to give to problem in the pagina asp of the company.  In
event 
view appears the following events: 
_CLASS: MicrosoftAC_Replication_Session_Authentication_ConFailed_Event
__SERVER: VBR001001-019A
ServerGUID: {243D3375-5C0C-41F4-BEDC-6FFBCE0B1F69}
EventId: 5031
GUID: {A00D00CE-DD05-42D6-96B1-FEB405FCD13B}
RemoteServer: VBR001001-019B
ReplicationID: vbr001001-019
ReplicationJobID: VBR001001-019AX1146887600X326284Xd7ba98
Status: 0x80070005
StatusMessage: Access is denied.
TimeGenerated: 11/5/2006 19:26:16
Type: 1


_CLASS: MicrosoftAC_Replication_Session_Connection_ConFailed_Event
__SERVER: VBR001001-019A
ServerGUID: {243D3375-5C0C-41F4-BEDC-6FFBCE0B1F69}
EventId: 5027
GUID: {B87D8D6C-8EDA-4E11-BA82-024898A3DCE1}
RemoteServer: VBR001001-019B
ReplicationID: vbr001001-019
ReplicationJobID: VBR001001-019AX1146887600X326284Xd7ba98
Status: 0x80070005
StatusMessage: Access is denied.
TimeGenerated: 11/5/2006 19:26:16
Type: 1
DisplayName: Replication Session Connection ConFailed

__CLASS: MicrosoftAC_Monitoring_Logging_QueryFailed_Event
__SERVER: VBR001001-019A
ServerGUID: {243D3375-5C0C-41F4-BEDC-6FFBCE0B1F69}
ConnString: Provider=SQLOLEDB;Integrated Security=SSPI;Data 
Source=200.246.177.16\MSAC;Initial Catalog=ACLog
EventId: 8015
GUID: {1974FD42-F33D-460F-B27B-B8FA7A686AD5}
OLEDBError: Source: Microsoft OLE DB Provider for SQL Server Description: 
Login failed for user 'VBR001001-019B\ACC_VBR001001-019A'. SQLSTATE: 42000

hr: 0x80040e4d

Query: SELECT TOP 91 * FROM PerfHistoryView WHERE (Name='Web Service
Current 
Connections (Server Avg Cluster Sum)' ) AND (TimeMeasured <= {ts
'2006-05-11 
20:25:33.000'}) ORDER BY TimeMeasured DESC
Status: 0x80040e4d
StatusMessage:  
TimeGenerated: 11/5/2006 20:25:33
Type: 1
DisplayName: Monitoring Logging QueryFailed


Leonardo