Please check if there is any session not sent: enter the BKOOL Cycling simulator and click in Settings > About app. Let us know if the field "Completed sessions remaining to send" is zero or not.
If it's zero, the session has been successfully uploaded to the website, though it may not have been processed yet. It will appear in your history in a few hours.
If the number is not zero, the firewall or antivirus on your computer could be hampering communications between the Simulator and the server. Try adding an exception in both tools for our program (BKOOLCycling.exe), or temporarily disable them. If the antivirus is free, you can simply uninstall it and install a different one later.