The current driver / Anywhere USB Manager Application download does not indicate that it will work with 2008 R2 64-bit.
legacy Windows versions not supported by Microsoft are not supported, see release notes:
SUPPORTED Operating systems
- Microsoft Windows 7
- Microsoft Windows 8.1
- Microsoft Windows 10
- Microsoft Windows Server 2012-R2
- Microsoft Windows Server 2016
- Microsoft Windows Server 2019
Try to update your 2008 system, or use the obsolete 2nd generation (G2) AW-USB-2 product, which uses different drivers.