Try following the advice in this link:
This will (if you're using 'Pro' or above) enable you to run a virtual XP machine, which can also be incredibly useful for running other, older software (as even for stuff it can't run natively, the compatibility mode is much better on XP).
Incidentally, if you're still having trouble, check your MIDI drivers, as eLoader tends to have issues with some of them (I have a USB - MIDI cable that doesn't work using its own drivers, but works like a charm using eMU ones...)