Bugfix for order export plugin OSCommerce

I need to have some bugs fixed in a self made OSCommerce plugin which exports order to a bookkeeping system. It works with SOAP requests which are sent to the bookkeeping system. This way the orders will be stored in the bookkeeping system. What needs to be fixed is: * For some orders, but not all, the prices are completely messed up and are stored with a too high price into the bookkeeping system. * The system doesn't work correctly with special characters like éèëê Please respond if you have experience with PHP, SOAP AND OSCOMMERCE.