Configuration Of Replication And Mail

Hello;

** I'am a student* in UTC in France and I have a probleme with a replication in
SQLServer 6.5.

The message error is that:
1-Replication cannot be installed as @@SERVERNAME is NULL

2-If Replication is uninstalled, all publications will be
eliminated and the distribution database[if it exist]will be
dropped. After the process has completed, this session will be
disconnected from the SQL Server. Do you want to unistall
replication?

3-Error 2812:[SQL Server)Strored procedure
'ma_base..sp_MShelp_subscriber_info' not found.

->I don't know why SQL Server want to found* this procedure;
perhaps because last time I creat a database named
'ma_base' and i do a replication a then i dropped it??

when i dropped, i receive this message:
4-Error911:[SQL Server]Attempt to locate ebtry in sysdatabase for database 'ma_base' by name failed no entry found under that name, Make sure that name is entered property.

And when i create a database with name 'ma_base', i receive this message:
5-Error 2812:[SQL Server] Stored procedure
'ma_bse..sp_MShelp_subscriber_info' not found

I don't know what i do???

Thank you very much :((