Cannot install LM4 :(

I am currently setting up a computer to re-master recordings I made using Cubase VST 3.7 & VST 5. I used the LM4 drum module on most of those recordings. The computer in question is set up with a 32-bit version of Windows 7 Pro. Every time I attempt to install it from my LM4 CD I get the same message informing me that I need to install LM4 from the original CD. But it IS the original CD. This is very frustrating as so far LM4 is the only plugin / VSTi / program that I used back in the day that refuses to install.

Are there any known workarounds or solutions? Thanks in advance.