Проблем с ERROR 1721

Моля за помощ! Започнах да инсталирам EPC OPEL и още в самото начало ми изписа ERROR 1721. There is a problem with this Windows Installer package. A program required for this install to complete could not be run. Contact your support personnel or package vendor. Action :
SBS_CallConfigurator_ Upgrade, lokation: ...\Configu...
Работя с Windows XP Professional 2002 Service Pack 3