problem get a ref cursor from java

Hi, i have the next problem:

i have a function what return a ref cursor, from java i do:

String query = "{? = call F_OBTIENE_DATOS(?)}";
call = (CallableStatement) conn.prepareCall(query);
call.registerOutParameter(1, Types.OTHER);
call.setString(2, '4');
call.execute();
rest = (ResultSet)call.getObject(1);

and i have the next error:

java.sql.SQLException: ERROR: cursor "<unnamed portal 1>" does not exist
at com.edb.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2662)
at com.edb.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:227

at com.edb.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:71

at com.edb.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:503)
at com.edb.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:417)
at com.edb.jdbc2.AbstractJdbc2Connection.execSQLQuery(AbstractJdbc2Connection.java:274)
at com.edb.jdbc2.AbstractJdbc2ResultSet.internalGetObject(AbstractJdbc2ResultSet.java:195)
at com.edb.jdbc3.AbstractJdbc3ResultSet.internalGetObject(AbstractJdbc3ResultSet.java:3

at com.edb.jdbc2.AbstractJdbc2ResultSet.getObject(AbstractJdbc2ResultSet.java:252

at com.edb.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:451)
at com.edb.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:423)
...............................

Please help.

Thanks

Alex

call.registerOutParameter(1, Types.OTHER);

Please use following:

I, tanks for the answer, now it works.