Is just the tail stitcking through? Make sure when you knit the first stitch of the new color that you don't wrap the yarn around the old yarn. Maybe a picture would help us figure out the problem?
DS Carter (11), DS Myles (9), DD Merlyn (7), DD Berkleigh (6)
Wonderful Wallaby for Linus' 1st birthday (9/16)
Birchbark shawl (my own design) for my mom's 60th birthday (9/15)
At least one ever-present felted bag