Roxio recordnow 6.5

I have xp home, and I want to install recordnow plus DLA, but it wont le me, it keeps giving me the following

setup has detecte the following incompatible software
installation cannot continue. please see the readme for more information

it doesnt tell me what the software is and i cant find no README.

This came with my dell dimensions 2400 and i had it on before and had been able to install before but now i cant, why i dont know
can anyone please help me
thank you