Well, unfortunately, I do not have Qt 4.5 anymore since I my disk was short on space - I know, it was stupid move . And yes, when I run qmake, I do not get any problems at all:
Qt Code: 
  1. C:\Users\Uporabnik\Desktop\NoordungMkICode\ClientDemo>qmake
  2. Project MESSAGE: Qt version: 4.6.0
  3. Project MESSAGE: Qt is installed in C:\Qt\4.6.0-rc1
  4. Project MESSAGE: Qt resources can be found in the following locations:
  5. Project MESSAGE: Documentation: C:/Qt/4.6.0-rc1/doc
  6. Project MESSAGE: Header files: C:/Qt/4.6.0-rc1/include
  7. Project MESSAGE: Libraries: C:/Qt/4.6.0-rc1/lib
  8. Project MESSAGE: Binary files (executables): C:/Qt/4.6.0-rc1/bin
  9. Project MESSAGE: Plugins: C:/Qt/4.6.0-rc1/plugins
  10. Project MESSAGE: Data files: C:/Qt/4.6.0-rc1
  11. Project MESSAGE: Translation files: C:/Qt/4.6.0-rc1/translations
  12. Project MESSAGE: Settings:
  13. Project MESSAGE: Examples: C:/Qt/4.6.0-rc1/examples
  14. Project MESSAGE: Demonstrations: C:/Qt/4.6.0-rc1/demos
  15. Project MESSAGE: Qt version: 4.6.0
  16. Project MESSAGE: Qt is installed in C:\Qt\4.6.0-rc1
  17. Project MESSAGE: Qt resources can be found in the following locations:
  18. Project MESSAGE: Documentation: C:/Qt/4.6.0-rc1/doc
  19. Project MESSAGE: Header files: C:/Qt/4.6.0-rc1/include
  20. Project MESSAGE: Libraries: C:/Qt/4.6.0-rc1/lib
  21. Project MESSAGE: Binary files (executables): C:/Qt/4.6.0-rc1/bin
  22. Project MESSAGE: Plugins: C:/Qt/4.6.0-rc1/plugins
  23. Project MESSAGE: Data files: C:/Qt/4.6.0-rc1
  24. Project MESSAGE: Translation files: C:/Qt/4.6.0-rc1/translations
  25. Project MESSAGE: Settings:
  26. Project MESSAGE: Examples: C:/Qt/4.6.0-rc1/examples
  27. Project MESSAGE: Demonstrations: C:/Qt/4.6.0-rc1/demos
  28. Project MESSAGE: Qt version: 4.6.0
  29. Project MESSAGE: Qt is installed in C:\Qt\4.6.0-rc1
  30. Project MESSAGE: Qt resources can be found in the following locations:
  31. Project MESSAGE: Documentation: C:/Qt/4.6.0-rc1/doc
  32. Project MESSAGE: Header files: C:/Qt/4.6.0-rc1/include
  33. Project MESSAGE: Libraries: C:/Qt/4.6.0-rc1/lib
  34. Project MESSAGE: Binary files (executables): C:/Qt/4.6.0-rc1/bin
  35. Project MESSAGE: Plugins: C:/Qt/4.6.0-rc1/plugins
  36. Project MESSAGE: Data files: C:/Qt/4.6.0-rc1
  37. Project MESSAGE: Translation files: C:/Qt/4.6.0-rc1/translations
  38. Project MESSAGE: Settings:
  39. Project MESSAGE: Examples: C:/Qt/4.6.0-rc1/examples
  40. Project MESSAGE: Demonstrations: C:/Qt/4.6.0-rc1/demos
  41.  
  42. C:\Users\Uporabnik\Desktop\NoordungMkICode\ClientDemo>
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I've added some debug messages.