“Can’t connect” try your network connection and password and try again”

Would you check this link Troubleshoot a wireless network connection | Xbox Support for further assistance.

Same things happening to me, I was able to fix it once before but my fix isn’t working anymore.

Hello

Error: Can't connect to your wireless network
If your Xbox 360 console can’t connect to your wireless network, there may be a configuration or wireless password problem. Try these solutions to fix the problem.

The error says "Can't connect. Check your network name and password and try again."

Only question I have is is the network you're trying to connect to secure? If it try removing the need for a password and try connecting again