DPN's - hole at cast on edge

[agileflower]

I have been learning to use DPNs...and I have read that knitting the first two and last stitches on the neelde can prevent laddering. So does slipping the first stitch from one needle to the next....however, using either of these (or both!) I still get a hole right down at the cast on edge.
I just saw a video online on slipping the first stitch (that would be knitted, I guess t