I cannot log in (change to new laptop/computer) device.

[Jethro_AC]

I change a new laptop/computer device and installed the SilVerTek App. Since my old laptop has an issue, I bought a new one. I generate a new usertoken using my PTS acc. and upload my new generated token using the new machine ID on my new device. I can't log in. I restart my pc and try to reopen the app, still I cannot log in to my SilVerTek account. It says that "Invalid User Account" but I'm pretty sure that I enter my username and password correctly. 
Please tell me what to do. Thank you so much!   -Jethro AC
PS:                         I hope this is helpful for anyone who has the same problem with changing device or machine ID (laptop/computer)