[Q] HTC Desire S: Can't install FOTA

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Hi all. I'm pretty much a DIY girl, rooted my Android phone last year with Revolutionary, and made it S-ON again yesterday so I can apply the updates, which has been long delayed considering the ICS and latest Sense are here and I still got Gingerbread and sense 2.1. I'm not sure though if I was successful in unrooting my phone. Here's what comes up when I press and hold volume-down and power:

**** LOCKED ****
SAGA PVT SHIP S-ON RL
HBOOT-2.00.0002
RADIO-3822.10.08.04_M
eMMC-boot
Aug 22 2011,15:22:13

When I try to install the system update, it turns off the phone and bring me to the fastboot/hboot white screen (you know what I mean), and I don't know how to continue from there so I just reboot my phone and return to its old software. I even tried to factory reset it but the same thing happened (Oh no, even the factory reset doesn't work now!). How do I get past this?

Just to note, I tried to make a gold card and install 5 different RUU... I just get "ERROR 131 CUSTOMER ID ERROR".

Please help me. I will be SO grateful. Thank you!