Qt link error

I install Qt (4.4.3) version of dmg files and debug files (dmg file) the instalation is full. I type

qmake -project (create project.pro)
qmake (create project.xcodeproj)

I open xcodeproj file in xcode (version 2.2.1) and copile project. The stage of compiler is good but the stage of linking send me this error:

/usr/bin/ld: /Library/Frameworks/QtGui.framework/QtGui load command 6 unknown cmd field

/usr/bin/ld: /Library/Frameworks/QtCore.framework/QtCore load command 5 unknown cmd field

collect2: ld returned 1 exit status
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I solved this problem by upgrading my xcode to version 2.5. Now the program can be compiled.