I can understand how important it is to successfully send an email to your contacts. In fact through further investigation it appears your account was still under our trial period. Trial accounts only allow users to send an email up to 100 contacts. both of your email lists were larger than this, causing them to be grayed out. The good news is you have since upgraded to a paid account and was able to send your email out. Please let us know if you have any further questions in the meantime.