[Q] Problem rooting kindle fire hd 7" topic

Hi, I'm noob so I can not post on the developers questions.

I'm having this problem

Quote:

6. Wiped /sdcard, can't reboot from recovery: You thought you had the ROM file on the sdcard, but you didn't, and wiped everything, so without a ROM image, you can't boot into system. Solution: Put the ROM file where your ADB binary is (usually inside platform-tools folder in Android SDK directory) and rename it rom.zip. On the device, boot into TWRP, select Advanced, then ADB Sideload. Connect device to PC. From here, run "adb" and hit Enter to check for your binary version, if it's anything lower than 1.0.3.0, you need to update the binaries by re-installing the latest Android SDK. Once the device is in sideloading mode and is connected to the PC, type "adb sideload rom.zip" and hit Enter. Now you'll find the ROM on the sdcard, flash, and you're done.

Everything works fine, kindle drivers for windows, SKD, ADB, etc, except that when I use the command adb side load rom.zip I get:

cannot use rom.zip

I need to know how to proceed and if I need a fast boot cable to transfer this image to the kindle sdcard.

Thanks in advance for your help.