gili77,
Down near the bottom of the WuHu screen, on the left side, you'll see "Useful Internet Links" and in there "WUHU Yahoo Group". Look around in there and you'll likely see the answers to your difficulties. The creator of this program, wuhu_software, visits this WxForum site as well as the WUHU Yahoo Group and has many answers to get you setup and running smoothly.