Hang on explain plan

Hi, Oracle 10.2.0.3 on W2003 I have the query below (with views) the explain plan hang when there are stats and is OK with no stats. Can you help me on this ? Thanks in advance 2 SELECT ALL b.r_object_id, dm_repeating1_0.state_name, a.object_name 3 FROM dm_policy_sp a, dm_sysobject_sp b, dm_policy_rp