"As per my experience, uploading file by natual DTS is so flexible. For example, the file name is not allowed to changed. "

The name of the file can be changed by using the Visual Basic Active X Script functionality within DTS. Just send the output of the text file destination icon to the active x icon and within place a script.

Hope this helps...script would be something like:

Function Main()

'Rename the output file with a datetimestamp (or anything else)

Dim fso, SourceFile, DestFile, theFile, theNow

Set fso = CreateObject("Scripting.FileSystemObject")

theFile = "e:\filedirectory\test.dat"   'whatever the file path is on the PC

theNow = now()

SourceFile = theFile & ".dat"   ' or whatver the file extension is

DestFile = theFile & "_" & Year(theNow) & Month(theNow) & Day(theNow) & Hour(theNow) & Minute(theNow) &Second(theNow) & ".dat

fso.MoveFile SourceFile, DestFile

Main = DTSTaskExecResult_Success

End Function