Problems with making a query when using Enum in entity

I have the following in a Question entity:

@NamedQuery(name = "Question.allApproved",    query = "SELECT q FROM Question q WHERE q.status = 'APPROVED'")

and

@Enumerated(EnumType.STRING)private Status status;// usual accessors

I am getting this exception:

Exception Description: Error compiling the query [Question.countApproved: SELECT COUNT(q) FROM Question q WHERE q.status = 'APPROVED'], line 1, column 47: invalid enum equal expression, cannot compare enum value of type[myCompnay.application.Status] with a non enum value of type [java.lang.String]. at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:501)

How do I fix this?