Freetds connection problem

Hello Guys,

I am really totally lost with Freetds.

I will resume what is did.

First i am running SQL server 2005.

1) i did a telnet 1433 on my server and it work correclty so my
problem is not a firewall related problem.

2)In SQL server 2005 the server name is "MYSERVER\SL"

I created a file under /etc/freetds.conf

like this

-----
[MS1]
	host = 192.168.10.50
	port = 1433
	tds version = 7.0


[MS2]
	host = 192.168.10.50
	port = 1433
	tds version = 8.0

	
[MS3]
	host = 192.168.10.50\SL
	port = 1433
	tds version = 7.0


[MS4]
	host = 192.168.10.50\SL
	port = 1433
	tds version = 8.0

	
[MS5]
	host = 192.168.10.50\sl
	port = 1433
	tds version = 7.0


[MS6]
	host = 192.168.10.50\sl
	port = 1433
	tds version = 8.0
-----

i have tried every connection like this
 tsql -S MSSQL5 -U sa
etc...
everytimes i  got
There was a problem connecting to the server
Any hints ??


Thanks for you precious help !


Franck