Ubiquitous computing proliferates complexity and heterogeneity of software. Component software provides better productivity and configurability by assembling software from several components. The purpose of this paper is to investigate system configurations on a component-based system and the side effects of the configurations. We have implemented a component-based Java virtual machine named Earl Gray, by modifying an existing Java virtual machine. The case study revealed several problems to use the current component framework when configuring software. We report three experiments of those problems and present a future direction to solve the problem.