Accessing CT via Kindle Fire

Hi everyone, Happy Christmas.   

One of my surprise gifts yesterday was a Kindle Fire.   Very nice it is too but I am having trouble using CT with it.   It won't let me log in at all.    I can browse the discussions without logging in but when I wanted to reply I couldn't as I couldn't log in no matter what I tried. So have resorted to the laptop to post this query.   Would appreciate any help but please bear in mind I am a bit of a technophobe 

Thanks