Problem in petclinic tutorial // schema name incorrect

[Angel Manuel Barrera Lugo]

Hello,

I'm doing the petclinic-extenden tutorial, at the beginning all runs
normally but after the the step 5 "Refactoring the app - making it your own"
making all the changes in the files and in Dom.xml we're getting this error:

Caused by: java.sql.SQLException: schema name incorrect: PETCLINIC in
statement [CREATE TABLE petclinic."Pet"

even i had done the persistence change in pet
@javax.jdo.annotations.PersistenceCapable(
        identityType=IdentityType.DATASTORE,
        schema = "petclinic",
        table = "Pet"
)

But still nothing.