Fuel-up not showing on my Dashboard
 

Hello,

I started to log my fuel 2 months ago, but every time I finish adding fuel details the website telling me "Fuel-up Added! We can't calculate your UK MPG yet. But Fuelly has started tracking and on your next fuel-up we'll have some stats for you."
and I can't see any information for the fuel that I have added.
I tried to delete the car and add it again but still the same.
could any one advice what could be the problem?

Thanks