Trouble flashing TWRP topic

Hello everybody. I'm having some problems flashing TWRP after unlocking the bootloader.

First of all, after unlocking the BL, I have flashed back the stock logo using

Code:

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fastboot flash logo logo.bin

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Then I tried flashing TWRP.

Code:

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fastboot flash recovery recovery.img

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Everything is successful, but booting to recovery from bootloader turns the phone off, and using

Code:

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adb reboot recovery

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brings about a 'dead android' screen with 'No command' written below it. I had to force reboot.

The phone itself works fine, and I was able to boot to TWRP, using the same .img file,

Code:

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fastboot boot recovery.img

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, and flash SU and whatever.

I don't really have a clue about what's going on here, can anybody point me in the right direction?

Thanks in advance :)