|You haven't supplied enough information.|
You list Vista as an operating system but you're saying the laptop has Win 98 on it - 98 original, or 98SE ?
If you're not sure, RIGHT click on My computer - Properties.
Whether it's Windows 98, or Windows 98 Second Edition, is shown on the right side of the first window you see.
Which one do you have?
Do you have two computers connecting to the router?
- is the other computer connecting to the router wirelessly or via a network cable ?
- is the other computer a laptop or a desktop computer?
- does the other computer have Vista on it, or some other operating system ?
This printer model can be connected either via USB or wirelessly; it has no wired network port.
There are no drivers available for it for operating systems previous to Win 2000.
There's no way you can use this printer model from Win 98 or 98SE, because there are no 98 or 98SE drivers for it.
Did you / do you have it connected via USB to the Vista computer?
Does the router have a USB port and you are / were connecting this printer to that via USB?
Vista can recognize and access computers on a local network, or partitions on the same computer with ME or previous OSs on them, but you can't access Vista over the network from the other operating system, so you have one way network access.
If you have another computer connecting to the router that has Vista on it , is the local network set up? Can you access the Win 98 or 98SE laptop from the Vista computer ?