Exmerge Error

We have two Exchange 2003 servers and would like to move our mail store from one to the other.  Both exist in the same organization.  When we run ExMerge, it fails with the following appearing in the ExMerge log:

Microsoft Exchange Mailbox Merge Program, v6.5.7529.0
Start Logging:March 28, 2006   09:55:56
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[09:55:56] Logging Level: None
[09:55:56] Reading settings from file 'E:\Program Files\Exchsrvr\bin\EXMERGE.INI'.
[09:55:56] Reading list of subjects for messages to be selected from file ''
[09:55:56] Reading list of attachment names for messages to be selected from file ''
[09:55:56] List of folders to be ignored has been read. 0 folders in the list.
[09:55:56] Current machine locale ID is 0x409
[09:55:56] Operating System Version 5.2 (Build 3790)
[09:56:09] Error getting property 'defaultNamingContext' from the Directory (CADRoutines::GetNamingContextData)
[09:56:09] An error was encountered while accessing server 'S-EXCH1'. For more information please refer to the ExMerge log file

If anyone can help with this, it would be greatly appreciated.