Q: Can't turn on or off my iMessage in settings on my iPad, it constantly asks for my Apple ID then takes me to the Apple webpage?

it is good to be part of the apple community,,,

Here is a brief description of my situation .

I live in Canada and travel to the USA frequently, I discovered if I leave my iMessage on my ipad active (and leave it at home) and iMessage is also active on my iPhone then if someone sends me a text message it will go to my iPad at home and not my iPhone that I have with me.

The way to remedy this is to turn off iMessage on my iPad before I leave then I receive all my text messages.

Now the issue I have is this last trip, I went to make iMessage active and it keeps asking for my Apple ID and password... I put those in correctly then it takes me to the Apple webpage?

It no longer gives me the option when I'm in settings under iMessage to turn it on/off. I go directly to the iMessage icon on my desktop and open that and I get the same Apple ID message and the same thing occurs??

Now on my iPhone 6 only some of my text messages are getting through to those I'm sending messages to?

I have entered my information several times, I've turned off/on my iPad several times and nothing changes ?

The last thing I did was to reset my Apple password... Nothing has changed?

Can someone in the Apple support community please help me with this...

Thank you in advance for your help, whoever you are....