Scheduling DTS Package using a stored procedure problem

The DTS package runs fine through Enterprise manager successfully.
However, when scheduled through a job that runs the dts through the
following code:

DECLARE @.findfile int
Exec @.findfile = master.dbo.xp_cmdShell 'dir
\\ServerName\folder\filename.xls', no_output
IF (@.findfile=0)
BEGIN
Exec master.dbo.xp_cmdshell 'dtsrun -E -Server\Instance
-N"DataImport"'
END

The servername specified in the above statement in a different server
than the server that the package resides on.

This is the error that I get when I try to run the same code using
query analyzer:

DTSRun: Loading...
DTSRun: Executing...
DTSRun OnStart: DTSStep_DTSExecuteSQLTask_1
DTSRun OnFinish: DTSStep_DTSExecuteSQLTask_1
DTSRun OnStart: DTSStep_DTSDataPumpTask_1
DTSRun OnError: DTSStep_DTSDataPumpTask_1, Error = -2147024893
(80070003)
Error string: The system cannot find the path specified.

Error source: Microsoft Data Transformation Services (DTS) Package
Help file: sqldts80.hlp
Help context: 1100

Error Detail Records:

Error: -2147024893 (80070003); Provider Error: 0 (0)
Error string: The system cannot find the path specified.

Error source: Microsoft Data Transformation Services (DTS) Package
Help file: sqldts80.hlp
Help context: 1100

Error: -2147024893 (80070003); Provider Error: 0 (0)
Error string: Cannot open a log file of specified name. The system
cannot find the path specified.

Error source: Microsoft Data Transformation Services (DTS) Package
Help file: sqldts80.hlp
Help context: 4700

DTSRun OnFinish: DTSStep_DTSDataPumpTask_1

Error: -2147220440 (80040428); Provider Error: 0 (0)
Error string: Package failed because Step
'DTSStep_DTSDataPumpTask_1' failed.
Error source: Microsoft Data Transformation Services (DTS) Package
Help file: sqldts80.hlp
Help context: 700

NULL

The job is owned by the SQLService account(Windows account) that has
System Admin rights and also is part of the Domain Admin User group.
The Domain Admin User group has full rights on the file that the DTS is
trying to access.

Any help in trying to figure out why the schedule job cannot find the
file path would be appreciated.

Thanks

KRI found the problem was the path in the log file : was using a mapped
drive vs a UNC path.