ErbB2 Positive Metastatic Breast Cancer

In phase I part Lapatinib (L) - dose level I, II 1000mg po daily dose level III, IV 1250mg po daily Intravenous Lipo Dox at the dose level reached on days 1 of a 21 days cycle• The recommended duration of combination treatment for each patient is at least 8 cycles, then, with continue combination treatment cycles or single lapatinib treatment (start with 1500 mg per day) at investigator's discretion. The treatment will stop if progressive disease, unacceptable toxicity or patient's refusal occurred. Intra patient escalation of dose level is allowed if no major toxicity noted. In phase II part Patients will receive recommended dose according to phase I study result. The recommended duration of combination treatment for each patient is at least 8 cycles, then, with continue combination treatment cycles or single lapatinib treatment (start with 1500 mg per day) at investigator's discretion. The treatment will stop if progressive disease, unacceptable toxicity or patient's refusal occurred. Intra patient escalation of dose level is allowed if no major toxicity noted.