windows vista -> nsis using game explorer

[DOCa Cola]

yea, as soon as i got this 100% running.
today i played with the uninstaller and couldn't get it working. i forgot to copy the gameuxinstallhelper.dll in the first place but i added it later so the uninstaller part does now look like that

code:
${If} ${AtLeastWinVista}

  SetOutPath $PLUGINSDIR

  File GameuxInstallHelper.dll # from dxsdk

  System::Call "GameuxInstallHelper::RetrieveGUIDForApplication(t '${GDF}', *g .r0)"

  System::Call "GameuxInstallHelper::RemoveFromGameExplorer(*g .r0)"

  System::Call "GameuxInstallHelper::RemoveTasks(*g .r0)"

  System::Call "GameuxInstallHelper::RemoveRichSaveGames(t '.ExampleSaveGame')"

  SetOutPath $INSTDIR

${EndIf}

i tested it and the path to ${GDF} is also correct set to the gdf binary.
Another problem i am experiencing are random crashes sometimes the installer calls the dll functions - both with the installer and uninstaller
http://img170.imageshack.us/my.php?i...6123647py9.png