Activation Limit

Hi,

I have been trying all day to try and get omsi to work and after many messages to aerosoft that didn't help I got one and It turns out that they had gave me the wrong serial code and when I put the new code in it said "the product has reached it's activation limit" and I want to play on it tonight but by now everyone will have gone home and I will not get a reply so does anyone know how to get around this problem?
Thanks.