I have wrote qt application and have installed it on Symbian^1 device Nokia 5800 XpressMusic. When I try launch this application it is not started. Application require Qt 4.7.3 libraries installed on device but this libraries is not preinstalled on Nokia 5800. I have built self-signed .sis file with smart installer option and have installed it on device. Process installation is exited successfully but application is not started! What is a reason?