Ah, that was the case! If the dialog-box has other shape (little arrow on the left, not the rectangle) you shoud click on it - it is kind of choose-an-option dialog-style on the player side (and there's also player's avatar). Good that you mentioned that problem, will add to the description on game page. I hope it resolves problem, if there's any other tell me and of course, thanks for reply. :)
Edit: If that was not the case, I have no idea what could be wrong, we play tested couple times and it worked fine, sorry for inconvenience.