Installed macally icemouse and it

Question

installed macally icemouse and it seems to work fine but I keep getting this message:System Extension Cannot Be Used: The system extension "System/Library/Extensions/MacallyMouse.kext" was installed improperly and cannot be used. Please try reinstalling it or contact the product's vendor for an update.I have an iMac G3 running system 10.4.11. Is this message to be ignored,or is there a real problem? After one day, mouse seems to operate fine.Thanks.......David [e-mail] 760-634-2218