Error installing on Macintosh

I've got an older Mac running on OS X 10.4.11

When I try to install Flashworks I get this message:

Runtime Error

Location: /Users/realsoftware/BuildSlave/QuickStableXCode/build/REALbasic/REALbasic Xcode/../../Common/plugin.cpp:74450
Failure Condition: pluginEntryTable.GetEntry ( entrypointName, out )
Failure Message: can't find plugin method Valentina.CacheSize as Integer

I've shutdown and redownloaded and reinstalled several times. Same thing each time.

I don't know if this would have anything to do with the problem, but I thought I'd mention that I just installed the unicode version of Teknia Greek right before this (without any problem).

Thanks for any help you can give me on this.

Linda