It appears that this model has been discontinued so that it will not be in their catalogue.
The instruction manual list for Adidas does not list them under models but as descriptions of features.
If you go to http://www.adidas.com/campaigns/watches_fw07/content/performance/pdf/performance_en.pdf
and scroll down to the one called "10 lap digital", this seems nearest to the model you have.
Try following the "time setting " instructions. There may be slight differences between models but there a limited number of alternative button sequences available, so it shouldn't take very long to work out the correct alternative if the one given is not quite correct.