There are a couple of options to fix this:

Select the Start button and type services.msc. 
When the services screen populates, look for Sage 100 Contractor Hosting Framework and verify if the Status shows Started or Running.  If not, right click the service and select Start.
Try entering registration information again.

 

Uninstall Sage 100 Contractor. If there are more […]

Resolution for '2011 SBS Standard & 2012 issue: 'Unable to deauthorize 127.0.0.1 as a license server: registration information is incorrect.' available: Yes.

The 2011 SBS Standard & 2012 issue or error code is a known related to Sage Accounting products. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the 2011 SBS Standard & 2012 issue yourself by looking for a resolution described in the article. If it is a complex 2011 SBS Standard & 2012 issue or you are unable to solve the issue, you may contact Sage Repair by clicking here or by using other 2011 SBS Standard & 2012 support options.

For more information about resolving issues related to 2011 SBS Standard & 2012 in Sage Accounting or to get support for the issue 'Unable to deauthorize 127.0.0.1 as a license server: registration information is incorrect.', click the link below: