Try now re-installing the
eBook Publisher software from ETI as there is a bug that generates REB1200 .imp's even though you have specified EBW1150 .imp's. Generally, installing eBookwise/GEB librarian, BookDesigner or even Mobipocket Creator AFTER eBook Publisher allows that bug to manifest.
Hopefully, now your eBookwise Librarian will be able to see and transfer the EBW1150 .imp files.
As a rule of thumb, always (re-)install eBook Publisher last. Hope this helps!
BTW, have you looked into using
Impserve? It's free and way better at transferring and even allows web surfing and on-demand conversions of .prc/.lit/.pdf ebooks!