Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'.

Hello,

I wan't to monitor replication from one server admin with this script but I have this error :
Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'.
/****** Object:  StoredProcedure [dbo].[vcf_replmonitor]    Script Date: 10/06/2010 23:49:35 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER procedure [dbo].[vcf_replmonitor]

@Srvsource VARCHAR (80),
@pub_db  VARCHAR(80),
@pubname varchar(100)

as

declare @sql nvarchar(4000);


set @sql = 'select repl.*
into replmonitor
from openrowset(''SQLOLEDB'',''SERVER= ' + @Srvsource + ';Trusted_Connection=yes;'',
     ''SET FMTONLY OFF;
      exec distribution.dbo.sp_replmonitorhelpsubscription
      @publisher = N''''' + @Srvsource + '''''   , @publisher_db = N''''' + @pub_db + ''''' , @publication = N''''' + @pubname + ''''' , @publication_type = 0''
      ) repl ';
exec sp_executesql @sql;

SELECT publication,
       publisher_db,
       subscriber,
       subscriber_db,
       CASE publication_type
         WHEN 0 THEN 'Transactional publication'
         WHEN 1 THEN 'Snapshot publication'
         WHEN 2 THEN 'Merge publication'
         ELSE 'Not Known'
       END,
       CASE SUBTYPE
         WHEN 0 THEN 'Push'
         WHEN 1 THEN 'Pull'
         WHEN 2 THEN 'Anonymous'
         ELSE 'Not Known'
       END,
       CASE status
         WHEN 1 THEN 'Started'
         WHEN 2 THEN 'Succeeded'
         WHEN 3 THEN 'In progress'
         WHEN 4 THEN 'Idle'
         WHEN 5 THEN 'Retrying'
         WHEN 6 THEN 'Failed'
         ELSE 'Not Known'
       END,
       CASE warning
         WHEN 0 THEN 'No Issues in Replication'
         ELSE 'Check Replication'
       END,
       latency,
       latencythreshold,
       'LatencyStatus'= CASE
                          WHEN ( latency > latencythreshold ) THEN
                          'High Latency'
                          ELSE 'No Latency'
                        END,
       distribution_agentname,
       'DistributorStatus'= CASE
                              WHEN ( Datediff(hh, last_distsync, Getdate()) > 1
                                   ) THEN
                              'Distributor has not executed more than n hour'
                              ELSE 'Distributor OK'
                            END
FROM   replmonitor

DROP TABLE replmonitor  

Thanks

bibi