Can't get Google verification to work in Infinite SEO

I've tried every which way to verify site by entering my Google verification code under "Step 2: Sitemaps" admin of Infinite SEO. I listed the site with www and without, I pasted in the whole code, and just the number part. (I've seen it upload both ways in my source code). I even stood on my head while typing (OK, just kidding about the last one). Sorry to have to have my hand held but what in #@!$ am I doing wrong?