ximian and a lonely blue screen

I've just installed Ximian Desktop and everything was Ok. But when I tried to reboot by the first time after installation the Desktop couldn't open everything I can see is a blue screen as background and a mouse cursor. Some tips? Who can help me? thanks -- Adagilson Batista Bispo da Silva Bibliotecário FIOCRUZ-Centro de Pesquisa Aggeu Magalhães Fone 81 3302-6524