I've had my Louet Jane table loom for about a month and am having problems using a boat shuttle. Sometimes it does okay, but about 20% of the time, instead of just shooting across, it just takes a nose dive down through the warp. Is this a common occurrence with table looms or am I doing something wrong? I've just given up and am using stick shuttles but I spent quite a bit on my two lovely boat shuttles that I can't use.