Quilted lattice stitch

I am knitting a blanket using the :quilted lattice" stitch and am having a slight problem. The pattern say to [I]k4 insert needle under loose strand and knit next stitch, bringing stitch out under strand; k5 [/I]. The url for the pattern is www.knitting fool.com. I’ve tried many,many times but I can’t get it. Can anyone help!!!
Cassie

It’s the loose strand from where you slipped the 5sts on row 2 with the yarn in front of them.

I got it. Thanks
Cassie