Error "EOleSysError. Unregistered class"

Hello

Trying start the program HttpDemo, which is included in the Delphi 3.0 demos, on the computer, where Delphi 3.0 is not installed, the computer gives message " Exception EOleSysError in module HTTPDEMO.EXE at 00033235.
Unregistered class." The program Internet Explorer is installed at this computer and it is connected to Internet without problems. How can I start the programs written on Delphi 3.0 for work in Internet on the computers, where Delphi 3.0 is not installed ?

Thank you