Wilmer Valderrama, Nick Lachey and Nicky Hilton can't be too happy these days with their Las Vegas venture. The trio invested in the Company American Bistro at the Luxor. But word is the eatery - owned by Pure Management Group, which is being investigated by the IRS - is not doing well. An insider said, "Word is it's closing due to lack of money and poor business practices. It has lost two chefs in less than five months." A rep for the company said, "Absolutely not. Company was closed Tuesday and Wednesday as we trained new chefs on a new menu." The eatery reopened last night - "all is on track."

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