Problems transferring with i Nav between V7R1 and V5R4

We have a brand new V7R1 partition and I'm trying to send a library from the V7R1 partition to the older V5R4 partition using iSeries Navigator V5R4. It fails, and the message I get in the joblog is this:

CPF9812 Escape 40 01/12/11 06:57:11.456944 QSRLIBS1 QSYS *STMT QZRCSRVS QSYS *STMT
From user . . . . . . . . . : JPLUTA
From module . . . . . . . . : QSRS1MED
From procedure . . . . . . : qsrSendMediaMessages
Statement . . . . . . . . . : 32
To module . . . . . . . . . : QZRCRMTC
To procedure . . . . . . . : RunCommand
Statement . . . . . . . . . : 49
Message . . . . : File @@5123 in library QYDSOBJ0 not found.
Cause . . . . . : The file name or the library name is not correct. If the
library name was not specified, the file may be in a library that is not
contained in the library list. Recovery . . . : Correct the file or
library name, or add the library name to the library list. Then try the
request again.


The library being sent is @@5123. Not sure what QYDSOBJ0 is, probably a temporary library. In QHST, I see a message that says a library cannot be displayed or restored because it's the wrong level.

Cause . . . . . : The file was saved from a more recent release of the
operating system or the CD-ROM was not created correctly. The operation was
requested for save file QYDS657270 in library QRPLOBJ.

I suspect that is the attempt to restore the save file that iNav sent over.

As a side point, when I manually create a save file and FTP it over, it works fine. Any ideas?

Joe