Help with sock pattern

[B]i am making tube socks for my son, am have a question on this part of the pattern with the same needle, pick up and knit 12sts aonlg side of the heel. hkint instep sts off the holder onto the needle: take all these sts from the needle onto a free st holder. knit the 13sts off st holder knit row) for 25 rows, ending with a knit row. please help

thank you[/B]

Sounds like you are picking up the stitches to start the gusset. Do you have a link or is it in a book?