Robo, unfortunately  Crystal Reports does not include Delphi as one of its supported platforms.
you need to read this articles 
"Crystal Reports Support for Delphi – History and Present".
  Crystal Reports Visual Component Library for Delphi SDK 
  
  Crystal
  Reports Visual Component Library for
  Delphi was retired in version 11.0 (XI
  Release 1) of Crystal Reports. For
  developers who prefer to use the VCL,
  it is possible to update the VCL
  supplied by SAP BusinessObjects for
  Crystal Reports XI to work with more
  recent versions of Crystal Reports
  such as Crystal Reports XI Release 2
  and Crystal Reports 2008. Please refer
  to the article Updating the Crystal
  Reports VCL. Version 11.0 of the VCL
  can be downloaded from here. The
  Crystal Reports VCL has not been
  updated since version 11.0 of Crystal
  Reports and thus new functionality in
  latter versions of Crystal Reports may
  not work. In particular, starting with
  Crystal Reports XI release 2, dynamic
  and cascading parameters will be an
  issue and in Crystal Reports 2008,
  reports using Flash Objects and
  Xcelsius will most certainly fail. For
  more details, see Note 1219099, “VCL
  component does not support prompting
  for dynamic/cascading parameter
  fields” and Note 1323599, “Is it
  possible to use reports created in
  Crystal Reports 2008 in previous
  versions of Crystal Reports?” in our
  Notes database.
  
  Note: There are no plans to update the VCL.
  
  ....Technical Support Disclaimer Delphi
  2007 (Read as Delphi) is not on the list of supported
  platforms for any version of Crystal
  Reports. Since Delphi 2007 is not on
  the supported platforms list, no
  issues with the Crystal Reports SDK
  can be escalated for a resolution with
  R&D, unless these are duplicated in a
  supported environment. E.g.; Microsoft
  Visual Studio .NET. 
Thread: Crystal Reports 2008 and Delphi 2007  
  Using the trial version of Delphi
  Prism which installed into a Visual
  Studio 2008 shell, on install of our
  Crystal 2008 product it automatically
  updated the shell to include our SDK.
  Everything just works as you expect.
  Please note that Crystal Reports does have to be the last product to be installed.
The best choice you have is to use visual studio integration with Crystal Report.
Bye.