Does setting GTK_IM_MODULE="scim" and QT_IM_MODULE="scim" (you also need to have scim-gtk2-immodule and scim-qtimm packages installed) help?
Does setting GTK_IM_ MODULE= "scim" and QT_IM_MODULE="scim" (you also need to have scim-gtk2-immodule and scim-qtimm packages installed) help?