Hi Kris,
first check if you have the right passwords and user names.
To check you should a native MaxDB tool like sqlcli instead of R3trans.
>sqlcli -d BAP -n devbap-u SAPBAP,<pwd> select user from dual
and next test the XUSER entry with the option -U <xuserkey>.
>sqlcli -U DEFAULT select user from default
Burkhard