My suggestion would be to check the following:
1) You have correctly "classified" your Destination Screen in "Categorization of Physical Screens" configuration option.
2) Once that is correct, pls ensure the following in "Pushbutton Sequence" configuration option:
a. If you have multiple Input fields within one screen then for the "last field" make entry for "PGDN"
b. For the entry with last TO line item pls have only "SAVE" instead of what you have currently. Reason being having a PGDN after SAVE as a sequence does not make sense if you are already on the last line.
3) Lastly pls check if your RF scanner is configured to send an ENTER instead of a TAB with each Barcode Scan.
Hopefully this help resolves your problem.
Thanks
HP