Eco Time / CS Time / TNA must be excluded from each client workstation's antivirus package.
For Windows XP - TNA must be installed into Program Files i.e. C:\Program Files\TNA and the TNA data to c:\Program Files\TNA\Data .
For Windows 7 32bit/64bit - TNA must be installed to C:\Programs Files (x86)\TNA (64bit) or C:\Programs Files\TNA (32bit) and data to C:\ProgramData\TNA\Data. Check that the permissions are setup correctly.
Make sure all features and hardware type that are not required are not selected. I.e. if you are using CSTC hardware deselect Capeclock and Actateks
Have Eco Time / CS Time / TNA license file or license details with you.
Windows Firewall - by Default Windows's firewall blocks Eco Time / CS Time / TNA . The Inbound and Outbound Rules for the firewall must be set to allow the program full access