Operators of a Bettendorf gambling boat say they had some back luck and now they hope a lawsuit will put them back in the bucks. Isle of Capri officials say in March and April of 2000, a group of scam artists took advantage of a computer software problem they were obviously aware of in some video poker machines. The games paid out more dough than they should have and the scammers collectively walked away with more than 324-thousand bucks. The casino filed a claim with its insurance companies to recover the loss, but a D-C-I investigation delayed negotiations. Negotiations are now underway, but casino officials say they filed the suit because a two-year statute of limitations on filing for insurance protection was approaching.