Good afternoon Joyca.
My apologies, time difference and a busy morning. Well, let's see.
1. Is SAP note 2231043 already implemented in your system? Reading it in a glance it seems that is provides additional details for tracking purposes.
2. With or without that note, please start via ST01 a trace on authorizations in the 3 systems: Solman, DTE, and DTA?
3 Try the retrofit once more and check in all the three systems for:
3.1 Security errors on the trace analysis in DTA and DTE for the user that is defined in SolMan in the RfC that should have names like: SM_DTACLNT300_TMW and SM_DTECLNT###_TMW? I believe the user should be something like SMTM<SolManSID>. Security trace analysis in SolMan for the user running the retrofit.
3.2 Run SLG1 and check logs for the 3 users mentioned above. Hopefully there is any error with additional details to look into.
If you need assistance with ST01 or SLG1, please let me know.
4. Also, would it be possible there is a sequencing dependency on the retrofit and you may be trying to move only one transport, but you need to start with an earlier generated one? Sorry, but I need to ask, although if there is a dependency I believe the user is warned in advance.
I hope this helps 
Regards,
Juan