sql server replication: I made two one publications and after i deleted them but two subscriptions still remain.How Can I delete them

Xavi,
it depends on the type of replication you had eg if your publication was a
Transactional one, then sp_dropsubscription will not work and you have the
delete the related row in MSreplication_subscriptions in the subscriber's
subscription database. If the subscription database is no longer involved in
replication (as a publisher or subscriber) then you can run
sp_removedbreplication 'dbname' to remove all the related system tables and
hence subscription info.
HTH,
Paul Ibison