SImple Log Shipping In SQL 2000

I am currently running a Standard Edition of SQL 2000 on a WIndows NT4.0 Platform with service pack 6a installed. I want to implement Simple Log Shipping on my Standby Server as a means of improving my ability to recover from a contingency.

The Setup is as follows:
1. Both the SQL Server Service and SQLAGENT Service on the Primary Server Start with a Domain Admin Account
2. Both the Primary and Standby Server have mixed authentication
3. The current security context of the User (Which happens to be a Domain Admin) is used for the Link Server Relationship.
4. The Directory on the Standby Server where the Transaction Log gets backed up to has permissions of "Everyone" - Full Control" as does the log file itself.

The error I am receiving is as follows:

Executed as user: xxxinvbsg. Backing up Northwind to
DISK=S5ad$yyyNorthwind_20020130_1540_LOG.BAK [SQLSTATE 01000] (Message 0)Processed 1 pages for database 'Northwind', file 'Northwind_log' on file 1. [SQLSTATE 01000] (Message 4035) BACKUP LOG successfully processed 1 pages in 0.264 seconds (0.007 MB/sec). [SQLSTATE 01000] (Message 3014) Execute [s5a].master.dbo.sp_ApplyStandByLog 'Northwind',N'S5ad$yyyNorthwind_20020130_1540_LOG .BAK',N'd:yyyUNDO_Northwind.DAT'
[SQLSTATE 01000] (Message 0) Executing RESTORE LOG Northwind FROM
DISK='S5ad$yyyNorthwind_20020130_1540_LOG.BAK' WITH STANDBY='d:yyyUNDO_Northwind.DAT [SQLSTATE 01000] (Message 0) RESTORE LOG is terminating abnormally. [SQLSTATE 42000] (Error 3013) Cannot open backup device 'S5ad$yyyNorthwind_20020130_1540_LOG.BAK'. Device error or device off-line. See the SQL Server error log for more details. [SQLSTATE 42000]
(Error 3201). The step failed.

Any help on this will be appreciated.

Thanks

Brad