Does that mean you're using OS 10.1.x ? LW has dropped support for OS 10.1 b/c it uses a much older version of Java that the newer LW can't handle very well.
LW has also stopped the availability of LW 4.8.1 since there's been significant changes such as with licencing for legal reasons.

Options: (a) Um ... if you have a dual OS (eg: OS 9 also), then you could downld the classic version & run it in the classic environment. (b) Downld 4.9.x anyway & try it. (c) I'd need the answer to the above question to give any other options.