First off; IF the usb hub does NOT have an AC adapter (plug into the wall adapter), it will not run the devices listed by running off of an existing USB port on the computer. That is like taking 500mA and dividing by 5 to equal 100mA per port (hub = 1 + 4 ports in the hub = 5). There will not be enough juice through the hub to support the devices. Here's some info for you:
Between it sounding like a NON-POWERED hub and using Win98SE, there could be hardware/software issues. It would be best to physically remove(unplug) ALL USB devices, then restart computer, remove ALL USB devices software, restart, check Device Manager for yellow or red indicators next to USB Controllers(last on list, expand click the + sign). Try each USB device and software one at a time. If that works, then try 2 at a time(using ports on computer only). If that works, leave printer plugged into back of computer and plug in hub in other port. If that works okay(no yellow or red indicators in Device Manager), plug in (one at a time) the Amazing box and the camera. Check to see if working. You need to have the USB patch from Microsoft installed and ALL the Windows updates for Win98SE and all the newest drivers/software updates for the devices for Win98SE also. Install all the latest. Make sure any anti-virus/firewall applications are DISABLED for the duration of un-installing/installing, etc. Re-activate after everything is working properly. You may need to look and see if you have another plug-in on the mobo itself for an add-in USB card and use that. I prefer to use powered hubs. If there is a little hole in the side of the hub you have now and a switch, it should have come with an AC power adapter.