sync problem (obviously...)

Hello, please excuse my english, i’m french canadian…

I have a LP stage II, a mbox mini (with no midi connections, 1usb), pro tool 8 , a the LP editor librarian

I know I need a midi interface to connect the LP with the computer, which would give me acces to the Editor librarian.

I<d love to use the midi clock sync fonction on the moog to sync my LFO with a drum machine track in pro tools. My first guest is that I would have to use my midi interface to go midi from LP to USB in mbox (with a midi sport uno) but then i would have no more usb connection to go mbox to computer.

could someone explain me what exactly I am missing ?
Thanks a lot, I’m really new at this, this got me really anxious !

miguel