Hi guys,
I contacted Titan support and here is their answer. It solved the problem for me:
"With regard to your log in problems, please follow the steps below:
1. Uninstall the software.
2. Delete all temporary internet files from the Internet Explorer options (Tools->Internet options-> Delete Files button->Tick Delete all offline content and press OK).
3. Disable the use of proxy servers (open Internet Explorer -> Tools ->Internet Options -> Connections -> LAN Settings -> untick “Use proxy server for your LAN”
4. Restart the computer.
5. Download the poker software again from the direct download link banner.titanpoker.com/cgi-bin/SetupPoker.exe and reinstall."