Translation of Impotenz

I need to write you one more sentence. This is what my teacher told me and the German language is so difficult. So please, as a last favor, would you please write the sentence for me in German?
Last week for example, I could have told you in advance that there is no chance for the other trials (if I knew): The traffic on the major website was too big. We should test it again sometime.
We returned before dusk, as we were afraid of not finding our ship in the dark. Once on the ship we decided to go for night swimming again in the open ocean. A few women on little boats approached us.