i don't know if compiz works in lxde
you need to install a package called task-3d
also install fusion icon
this will add the fusion menu to configure window decorations and the module to configure, enable or disable the desktop effects
you need to have a powerful video card to use compiz, if your machine is kinda old and you have a onboard sis or via video card it is possible that you can't use compiz
about that app asking for compiz, i never seen something similar, maybe is something related to cairo?