pls help resolution about TPM ownership pwsword under Win8 OS in DELL precision R7610/T3610/T5610/T7610 opti 9020 plafrom

Hi all friend I have follow problem
TPM ownership PWSSWORD is invalid of TPM manegement under win8(9200) OS in precision R7610/T3610/T5610/T7610 opti 9020 plafrom
follow issue pls help provide solution
1.After set ownership password,click change ownership password,no prompt type previous password.
2.After set ownership password,click turn off /clear TPM,no prompt type previous password.
pls help provide link about win8 TPM doument TKS