Client will not connect to server

[indypctech]

hello everyone I have had sambapos working fine now for several months this is my setup
windows xp server
windows xp bar
windwos xp kitchen
windows 7 cashier

now the following stop working today
windows xp bar
windows xp kitchen
firewall is turn off on all
correct string for password and user name

now I get the following msg
Can not connect to database with current connection settings

error msg
An exception occurred while initializing the database

my windows 7 machine connects with no problem 

please help

[indypctech]

I guess i will answer my own question

Problem was solve doing the following
remove windows xp from terminals
and install windows 7 after that everything work fine