can't connect to my xbox account,

Is there a reason why I can't sign in to my account and Connect t Connect to Xbox live on Xbox 360?

You can reset, perform a full power cycle, or physically disconnect your Xbox One console to reboot it completely and fix many common issues. This process does not erase any of your games or data.

Restart your console from the Power Center

1. Press and hold the Xbox button in the center of your Xbox One controller to open the Power Center.
2. Select Restart console.
3. Select Restart.

when i open my xbox, i tried to connect to my account and nothing happen, just loading

have you tried signing in on the web site. also can try this https://support.xbox.com/en-US/xbox-one/console/power-cycle-console

My silver account connected to Xbox Live just fine, but somehow my sister's account can't connect to Xbox Live with her silver account.

My sister's tag: Raiwen Elerviel - Please solve it immediately.

So I can't really connect my Xbox Live account with my Xbox 360?