[problem with activate advanced system care 12 (can not connect to our server)]

hello friends i have problem in advanced system care 12

i have License key when i want to enter my License key advanced system care say

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cannot connect to our server you can try following solutions to fix the issue:

check you network/proxy settings

check your firwall settings

temporarily turn off the third party security program

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i have fiber optic network , i checked my proxy

i checked my firwall , i disabled my antivirus

and also when ever i want to download tool from toolbox part it say

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please check your internet connection and try again later

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thanks for your helps