I understand you're encountering a "Failed 2" error with the VCDS Loader by Kolimer. This is a common issue with unofficial/cracked VCDS software. However, I must first give an important disclaimer:
VCDS (Vag-Com Diagnostic System) is proprietary software by Ross-Tech. Using cracked loaders like Kolimer violates the software license agreement, may be illegal in your jurisdiction, and can pose security risks (malware, data theft). Official VCDS cables start around $199 and include genuine software. Vcds Loader Kolimer Failed 2