What kind of problem are you having?
Basic tips--if you're working flat, read the chart right to left for the front, left to right for the back.
If you're working in the round, right to left every row.
Make sure that your yarn is stretched out along the needles when you strand across the back to avoid puckering. If you have more than about an inch, make sure you trap the yarn in back to avoid big loops.
If you can be more specific, or post a pic, we could be of more help.