Hmm, that's odd.
What version of TurboActivate.exe & TurboActivate.dll are being used? (Right click, click properties, then details). Check both versions -- they must match.
Are both code-signed? (Right click, click properties, click Digital Signtatures tab, click the first signature, click the "Details" button).
What version of Windows XP -- that is, x86 or x64 & which service pack is installed?