Cannot access CML using VPN

[chi-yin-cy2-ho]

After getting the access information from CML, I tired using cisco VPN to access the CML lab. But cannot. the error shows time out. 

[Torbjørn]

Hello @chi-yin-cy2-ho,

Are you able to resolve the IP address of the sandbox successfully? 
Do you get an "Open" if you telnet to the port your sandbox has been assigned?

[chi-yin-cy2-ho]

Sorry, after getting the access information from the CML Lab, which requests using VPN to access the Lab. unfortunately, as the screenshot, the VPN connection time out. I tried a few times and failed.  

How the provided VPN information and cannot using it access CML. 

[Torbjørn]

It should "just work" provided that you can reach it. 

Could it be a firewall issue? Can you see anything in firewall logs?
Are you able to establish VPN connection to other Anyconnect VPNs?
Could you try ending the sandbox and re-provisioning it?