You can not send it directly. Because they are different. But, MB = XYZ Bank account PP = XYZ Bank account. MB > XYZ Bank > PP. Simple.
Paypal and Moneybookers are separate companies, so it's not possible to do a direct exchange between the two. You can exchange funds with someone (but be very careful!, do this only if you know someone very well).
from moneybookers you can only transfer either to other moneybookers users or to your bank account attached with your account
Best way is find a good friend of yours who maintain both paypal and moneybooker. so without any hesitation you can do the exchange.