cant install DFLW.PFF

[crash_demons]

alright i have the original CD and an original CD-KEY i had DFLW installed once on XP home and it worked fine...now i Have the same CD and tried to use it for XP Professional but the DFLW.PFF that appears on the disc is 0 bytes and when it installes the game the installed DFLW.PFF is 0 bytes and it doesnt see the game as installed on the autorun dialog....and if i try to directly open the game (main executable in the install dir) it gives me BS errors.....if i remember correctly i had once solved this by using a copy of the dflw.pff i had...i dont have a copy of it now as it wont install
The errors are:
"Please insert correct CD-ROM, select OK and restart the application"
and DFLWLC gives me:
"unable to find resources, missing CD?"