to SparkPeople! I am glad you stumbled upon the site. I also stumbled upon it in May of this year. It has changed my life and I know that if you put in the effort and get involved, you will see success too! There are so many people on the site that give great support and have inspiring stories to motivate you to keep pushing.
In answer to your question about replying to messages, you could check the technical support message board. They should be able to help you there.
Good luck to you!