Thank you showing interest in Chemistry add-in for Word.
The possible reason for this issue could be the add-ins might have been disabled temporarily after installing Service Pack 1 to Office 2010.
If above is the case please check the add-ins of your interest are disabled or not with the steps given below :
Click on the Word File -> Options -> Add-ins
If the entry of add-in you are looking for is present under the Category “Inactive Applications Add-ins” it implies that is been disabled temporarily
In order to enable it follow the steps given below:
Select “Disabled Items” in “Manage” Combo Box
Click on “Go “
Select the add-ins which you need to enable in the Disabled Items dialog and Click on Enable Button
Select “COM Add-ins” from “Manage” Combo Box
Click on Go
If you find the entries of Add-ins that you have enabled in the step c) unchecked, please mark them
checked and Click on OK.
Now Add-ins will start working fine. Incase above solution doesn't work please unistall and reinstall the add-ins . The steps to be followed for removing and reinstalling the Chemistry Add-in for Word can
be found at the link:
Please let us if this answers your query and also let us know if have any further queries/Concern with the same.
MSR Support Team