BASIS need to investigate on this... check base with them and have it resolved.
Have you checked the authorizations of the Generic user?
Have you tried to process the hung TRFCs manually for one data load?
to find the hung TRFCs for a particular data load --> goto monitor screen of data load --> menu --> environment -> job overview --> source system --> enter user id n pwd --> goto job log --> find (CTRL+F) --> enter "sysfail" --> this will display the hung TRFCs which are not processed with respect to that particular data load --> next goto SM58 in ECC --> search for that TID and select it n process it manually and check if the load is getting completed or not?
Regards
KP