What is the JRE that was installed in your XP computer? We recommend installing the JRE 1.4.2_19 first, then install the SetupTL6.exe file that you download from the website during upgrade.
Please quit the existing i-TRiLOGI and TLServer before you run the installation SetupTL6.exe program. The TRiLOGI and TLServer need to be closed so that the setup program can overwrite their respective .JAR file.