Marcello Fontolan schrieb:

> I'm always getting this erros trying create a foreing key.
> Any help?

Even if the info you supply is very marginal I think the problem is that
you have several connections to your database established.
When adding a foreign key constraint you have to have single user access.

If this is the case and you still got propblems you should tell us the
exact error message and show us the alter table statement you use.

Luc.