log in help.

[negitive]

so i have made now 3 accounts and can not log into any on my nokia lumina 1520. it is att carrier locked using straight talk sim and service. it is a RM-940. i love this site and forum but am still trying to have all of my accounts together so i can see what i do. i mean i can use the page in the web browser but i bought the app... only a dollar but if i cant use it fully what good is it. i have been converted from iphone and cant figure out why i cant log in. uninstalled and reinstaled the app... just dont know... i am running 8.1 with the update... HELP

 

[Branta]

First step is easy. Describe why/how your login attempt fails. What do you see, what goes wrong? You need to help by being our remote eyes on this.