Endnote has stopped letting me add new references

Can anyone help me???

The button is still there, but grey, so i cannot click on it. I’ve tried to uninstall the program and reinstall, but the problem is still there!

Please help.

Can you take a screen shot and attach it, so we can see where this is happening?

Can you take a screen shot and show us when/where this happening? 

How long ago did you start using Endnote?  Does it think you are in an expired demo?  How many refs are in the library now.