Please call attendant. Invalid cd-rom or cd rom not found

[frscolasc]

Hi guys.
I am making progress on my friends Sigma 1700 "Game of life". I bought a Dallas all-clear chip from John Rudy and put it in, booted up until clear was completed, put the original chip back in, and then booted up again. Now I am getting a new message:
"Please call attendant. Invalid cd-rom or cd rom not found."
I tried changing out the cd rom drive and got the same message. I tried burning a copy of the game cd with nero and got the same message with the copy. I double checked that the number on the U-52 chip matched the number on the game cd. They both say "00664".
Can anyone give me some other suggestions to try and fix this problem? My guess at this point is that the game cd is bad. If that is so, where can I buy or download a new copy? I have searched google and have had no luck. I also looked on Rudy's site and did not see this game listed.
Any advice would be much appreciated.
Thanks,
Floyd

[sooklal]

check battries first then perform then when putting boot chip make shure all pins on chip is making contact