How many sessions can start

[Elisio Catana]

I have many users at same server and i want modify my destop to xfce, 
but at this moment i have many problems.

When i login with a user, all other users can't login.
Can anyone telme if i can have many sessions??

tanks

-- 
Elísio Catana
ecatana at hal.min-saude.pt

Divisão de Informática e Telecomunicações
Tel: 272 000 155
Fax: 272 000 257
email: informatica at hal.min-saude.pt

Hospital Amato Lusitano
Castelo Branco
Av. Pedro Álvares Cabral
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Fax: 272 000 257