Did you register the *correct* version? Seems odd, but this gave a lot of confusion in the past. I.e: which version did you download, Delphi 7 Personal or Delphi 6 Personal? The only way I could find to register was by clicking on htp://www.borland.com/downloads/download_delphi.html and then clicking on. Embarcadero Developer Network hat folgendes geschrieben: Delphi 7 Personal is not available for download. If your received the software on a disk bundled with a book or magazine, you can use the following serial number and key to register. Serial number: YH?Z-2WDEGK-S48529-3AS3 Authorization.
Delphi 7 is a very popular pre-.netDelphi version. It was announced in August 6, 2002.

see full article: Delphi Books
| Delphi Versions | |
|---|---|
| Win16 | Delphi 1 |
| Win32 | Delphi 2 • Delphi 3 • Delphi 4 • Delphi 5 • Delphi 6 • Delphi 7 • Delphi 2007 for Win32 |
| .NET | Delphi 8 |
| Win32 + .NET: | Borland Developer Studio 2005 • Borland Developer Studio 2006 • CodeGear RAD Studio 2007 • CodeGear RAD Studio 2009 |
| Other: | Kylix • Delphi for PHP • 3rdRail • Turbo Delphi 2006 |
| More info: | Release Dates and Codenames • Compiler Release Dates • Compiler Conditional Defines |