Replication Pull subscription problem

Iam trying to pull subscription and Iam getting same error over and over again. The error says:
****SQL Server Enterprise Merger could not create a pull subscription to publication "database name"
Error 15004: Name cannot be null *****
ThanksHi

Its because of non-existence or invalid server info on sysservers table. Please follow the instructions to fix the above problem.

exec sp_dropserver <your_local_server_name> -- subscriber

exec sp_dropserver <remote_server_name> -- publisher

exec sp_addserver <your_local_server_name>,local

exec sp_addserver <remote_server_name>

shutdown -- it is mandatory to take effect otherwise you still get the same error
go

Start the sql server with SQLSERVERAGENT

exec sp_helpserver -- it should display your local server and publisher

Then, try configure pull subscription

Cheers
Sekar|||What version does this happen in? I thought Microsoft fixed this problem a while ago.