Subway, Poseidon, Hubs, & USB Printers

[Rabbi]

I'm experiencing some garbage while printing to my HP Deskjet 648c with the latest version of TurboPrint v7.6(?) setting the device to USBParellel.device, and using the latest version of Poseidon, ver 4.4 (?), with my NTSC A1200, and Subway.  I finally debugged what the problem was - the printer was plugged into a self-powered hub (Belkin?).  I removed the printer's plug from the hub & plugged it into the direct output of the Subway itself and it worked without printing the garbage it had been printing when connected to the self-powered hub.

My question is this:  What do I need to modify in the Poseidon configuration to allow me to plug the printer's USB cable into the self-powered hub without it printing garbage again?  Do I need to do something in regards to timing or handshaking?

Also, not every program would print garbage, such as TurboPrint utilities wouldn't, but a print in iBrowse would.

[Rabbi]

This printer has both a Centronics & a USB connector on the rear of it.  I'm using strictly a USB cable (is it a type "A" USB connector that's popular printers?).

Definition of "Garbage" would be a string of characters printing out not as shown in the screen.