Calorie counter sync

I had entered all my diet data on Calorie Counter app but when I "synced" it with FatSecret I lost all of the data!!! How to fix!?!?

I don't think you can fix it.

The sync feature is for the initial program to phone connection. After you are synced you don't need to do it again. When you put in information you don't need to save. Just exit to your home screen and the update will happen shortly.

I think you should retry to sync the data again and try as suggested by WU

i've got a similar problem, having sync'd i now cannot access any data, add food (on either my phone or online) and the app now won't reckonise my username or password!!!!!!!

Try restarting your phone. It can't hurt to try.