It could be the settings.. My fisher use to do the same until I played with the graphics, as well as my hunter. Try following this
Got it from their site, hope it helps.
Requirements and Instructions
1. Start the script and wait for the GUI (Graphical User Interface) to load.
2. Make sure roofs are turned OFF under RuneScape settings.
3. Move your character to near the selected starting location (anywhere in the loop should be fine).
4. Have an axe either in the character's inventory, equipped, or in the character's bank.
5. If granite mining, be sure to equip enchanted water tiara or have Waterskin(4)'s in your inventory.
6. Select the checkbox of your desired ore. You may select multiple ores (i.e. Coal + Mithril).
7. Select your desired area from the dropdown list.
8. Hit start.
9. Recommended: Watch your character do one bank run (OPTIONAL).