Thanks a lot The-S-Owl'
Here are a few things I forgot to mention.
First of all the Game has been uninstalled and reinstalled from the original CD 4-times.And there is no CD-KEY requirement.(No key on the cover, neither in the installation menu, nor on the jewel case)which suggests that this is the Asia-Pacific version(if the home site is correct).Hence the patch I downloaded is correct.
(1.21 ASIA)
Now, the protection scan with the ProtectionIDScanner 3.4 by CDKiller says it is Securom 4.84.81.005.Talk about Restaurant Empire with Securom!

But it scans the fixed exe correctly mentioning starforce and iMMERSION
The other thread about Restaurant Empire by m3tech speaks about a similar problem.Viper_Spit01 solved his problem by pointing him to the site :*************.com which refuses to open up in my browser.(All I get is blank page or error message about the non-existance of the site.)I hope I have made myself very clear ny now.I reeaaly love my original CD, and don't want even a teeny weeny scratch on its surface.
ANY help will be seriosly appreciated.