??? with circular knitting for baby blanket

[teena53]

I am a "newbie" at knitting...help please? I am using circular needles for the 1st time...knitting a baby blanket. After casting on, I am using a seed stitch (1 knit, 1 purl). The first row went fine, but when I started the second row, all of a sudden there is no "break" between my first and second row...there is yarn connecting my "last" stitch on the first row & the "first" stitch on the second row...as if I am knitting in a circle. What did I do wrong? Can I correct this without starting all over? thanks! teena53