Net::LDAP Search Filter

Hello all,

I am trying to run this search against my directory service with the following filter and it returns nothing.

(&(employeetype=x)(employeetype=y)(objectclass=*))

But if I do just:

(&(employeetype=x)(objectclass=*))

Or

(&(employeetype=y)(objectclass=*))

I get search data returned.

Could some point out what's wrong with the first filter?

Thanks