Hi @heshamk :
These are possible causes of your issue:
Ø The player control is not properly installed.
Ø The player control is prohibited.
Ø The local firewall is enabled.
Ø The PC operating system is Windows 7, Windows 8, or Windows 10 and the browser is not run as an administrator.
So, based on them, these could solution it:
1) Reinstall the player control as prompted.
2) Allow the player control.
3) Disable the local firewall.
4) Right-click the Internet Explorer icon and choose Run as administrator from the shortcut menu.
Regards,
HAzcanio