Unable to connect wifi to samsung tab 2.70


Feb 13, 2013
Having trouble connecting my tab to the internet,it has been six weeks since I last used it,

when I started it up earlier it asked for my password which I put in,then a window appeared
asking to cancel or ignore,(or something similar) I clicked on the last one as I was unsure what
to do,

so when I now click on the wifi it says authenticating then saved. then it returns to authenticating,
I cant seem to find the password box to try again,i have the BT router 4,

I connected my tablet to my pc to see if I could find something that may help me,but, I am stuck.