If a server has the Solomon client installed, you cant rely on the location of your DMG’s being in the bin directory.  They may not be called correctly.  You need to remove them from the GAC (Global Assembly Cache).

1. Pull up the c:\windows\assembly directory on the machine.
2. Highlight all DMG* and FMG* files.
3. Right-click and choose "Uninstall"
4. Recycle IIS Note: if possible, we recommend a full server reboot

Note:Screenshot only shows DMG* files highlighed, but you will also need to uninstall the FMG* file.