Hello Cameron,
Could you let us know what version of OpenManage Essentials you are using along with Silverlight version? This may help us narrow down the issue.
Additionally, you might want to try below pointers and see if issue gets resolved.
1. If you are using Silverlight 4.0 or 5.0, try uninstall it and install Silverlight_Developer from go.microsoft.com/fwlink ,hopefully it will solve your problem
2. if the issue still persist, install the Silverlight 5 tools, which you can find on this page: Silverlight.net downloads page.
Thanks,
Rajiv