Hi czajkowa,
We haven't heard of SecureLine timing out on certain sites before. Do you have a good internet connection in the new location or any firewall provided by your ISP that might be slowing down your connection?
Could you share some of the sites? Also, please send your log file. It can be found by going to C: Program Data, Avast Software, Avast, Log. It is the secureline.txt file.
Best regards,
Davidek