It seems your installation (dll, etc.) are corrupted. I would recommend that you uninstall the connector and re-install it.
Regarding LEF, you must contact your QlikTech counterpart or Partner to get the manual LEF for SAP Connector. The Server or Desktop LEF will not work. SAP Connecter get's it's own license, thus a separate manual LEF file. You would need to enter this LEF only once and then it will never ask again.
While re-installing the connector, you may want to install 5.3 version out there. Comes with new SAP transports and many additional connection options. I know it's not easy to "just" upgrade it, but as far as I know, there are no major changes in the basic SQL connector portion.
Hope this helps you.
Rakesh - you were exactly right.
Uninstalling / reinstalling the SAP Connector did nothing. I emailed QlikTech and got a LEF file within two hours. My applications are now refreshing normally.
I know the newer connectors have some great features. As you know, SAP Connector upgrades are not "simple" tasks. J One thing at a time…