Anything I can do at this point?

I have an ATT M9. It's currently S-ON, Relocked. It has the stock recovery and cannot boot to android after a failed RUU. I have been trying to flash the latest RUU again

Code:

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RUU_HIMA_UL_L51_SENSE70_ATT_MR_Cingular_US_2.6.502.18_Radio_01.01_U11440601_72.02.50602A_F_release_446474_signed_2

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but it always fails at around 62% with an error 155. Is there anything that can be done to fix this issue?