Can't update my nexus one,, HELP!!

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so i've been trying to update my nexus one for the past two days and i couldn't do it, i'm on version 2.1 (i know my phone is very old :P ) but i fail each time i try to manually update it,
i've also tried updating it to 2.2 several times but it didn't work,
the problem was that when i click on "recovery" i dont get the /!\ sign instead it takes me to a page with some options like flash sd card, reboot now,
yeah i'm on build ERE36B i thought that this might be the problem but i don't know.

please help me, yeah excuse my english i'm not good at it :P and thank you

Go on shipped rom : http://shipped-roms.com/download.php?category=android&model=Passion%20(Nex us%20One)&file=PASSIMG_Passion_Google_WWE_3.10.170 0.1_GRJ22_release_signed.zip
Then find thé latest Gingerbread version for Nexus One
Download the rom and rename it to PASSIMG.zip then copy it to the Root of sdcard
Power off your n1
Press power button+ volume down You will enter in bootloader mode then wait

Sent from my Nexus One using Tapatalk 2

thaank you so much!!!
finally someone provided me with an answer!
just updated my phone and it worked!
thank you again

Glad it worked

Sent from my Nexus One using Tapatalk 2