lrnhelper utility and Homeseer - Disabled Inject IR Code

I, can't for the life of me, figure out how to 'Inject IR Code' a discrete pronto code to Homeseer's learning screen. I have tried all kinds of things....
Here is what gets me the closest:
1. Shut down Homeseer (Otherwise lrnhelper crashes)
2. Start lrnhelper
3. click the button 'Learn an IR Code'
4. click a button on the remote and the hex code appears.
5. Remove that hex code and replace it with the discrete code.
When I do #5 the button 'Inject IR Code' becomes disabled.
Any ideas?
Thanks,
Chris
Here is what gets me the closest:
1. Shut down Homeseer (Otherwise lrnhelper crashes)
2. Start lrnhelper
3. click the button 'Learn an IR Code'
4. click a button on the remote and the hex code appears.
5. Remove that hex code and replace it with the discrete code.
When I do #5 the button 'Inject IR Code' becomes disabled.
Any ideas?
Thanks,
Chris