garmin upload does not work - for me

Hi

I seem to have some problems with the Garmin upload (it has worked before). I get to the page, pres the Garmin connet, it says that it has completed with a 100 % download and is now evaluating the data. After a approx. 30sec. it returns to the Garmin connect screen without anything registrered. Am I doing anything wrong or ....

Best regards

B. Nielsen