You have a recent version of Java installed?
You downloaded the patcher program (patcher.jar)?
And the relavent patch file (.pat)?
And the relavent ROM(s)? (extracted from the zip)
Put the patcher, patch file, and ROMs in the same directory/folder?
Brought up commandline prompt?
Navigated to the folder with everything in it?
Invoked java in the form: "java -jar patcher.jar [romfile] [patchfile.pat]" ? (You can't just double-click on the .jar)
EDIT: I was just able to patch both the "tapper" and "tappera" versions. Make sure you're patching the correct ROM file: "tappg0" for one set, "pr00_1c" for the other. Or if you're using data read from your EPROM, perhaps it's bad or misread.