Sorry, a little off topic, but to clear some statements/questions in this thread:
All six statements below are true:
- Windows supports multiple (
physical) mouse (
devices). (XP/ME/98/2000)
- Windows does not support mupltiple mice (
cursors) (
in normal applications). (XP/ME/98/2000)
- Windows supports multiple (
USB) mice in directInput. (ME/98)
- Windows does not support multiple mice in directInput. (XP/2000)
- Windows supports multiple mice in RAWINPUT. (XP)
- Windows does not support multiple mice in RAWINPUT (ME, 98, 2000), and crashes instead if RAWINPUT is used. (ME, 98)
Pet peeve: "mouse" is a word with multiple, related meanings; each of those meanings incompass different things;
People think these different meanings are the same thing. def: mouse:
a: "a hand-operated electronic device that controls the coordinates of a cursor on your computer screen as you move it around on a pad;" (dictionary.com) aka "mouse" or "physical mouse"
b: the cursor on the screen that is controlled by the physical mouse device. aka "pointer" aka "cursor" aka "mouse pointer" aka "mouse cursor".
c: any physical device that controls the cursor, such as trackballs or lightguns. aka "mouse device"
d: the data used to move the cursor. aka "virtual mouse" aka "system mouse" in directX directInput
e: all of the above
All these are related, but "windows only supports one mouse" refers
only to meaning b, and partially to d. WinXP, ME, and 98 all can have multiple mice and mouse devices connected to the same computer no problem.
It really should say "windows only supports one cursor", but that leaves out "windows makes it very hard to see the mouse data of each individual mouse seperately."
Here's a fill in the blank with all choices correct:
Windows _______ support multiple mice.
a) does
b) does not
c) mostly does
d) makes it hard for applications to
d) makes it impossible for normal applications to
d) XP makes applications to be specially coded if they want to see mouse devices seperately
e) does but does not
(choice letter matches definition letter, above)
I know I've said windows doesn't, but I'm talking b & d, not number of physical devices.
Hold on, I'm not sure if I said this so far, so I'll say it now:
You can connect more than one mouse on any windows (98/2000/ME/XP), yet none of them directly support applications using them as seperate devices.
Okay, back to the original poster's question:

Windows should be reconizing optipac, as long as it (and the devices connected to it) are receiving enough power. As Com[Plex], suggested, try connection the optipac without anything connected: if it works, it's a power or wiring problem.