Taxiway Designators

Does anyone have any ideas why my AF2 taxiway designators can no longer be assigned using AF2_221?
Double-clicked and went to Properies with Blank highlighted and it will not accept any input from the keyboard.
I've done hundreds of taxiways since FS2k2 and have no idea why it all-of-a-sudden don't work using FS9/AF221
Thanks for any suggestions
Bill

Double-clicked and went to Properies with Blank highlighted and it will not accept any input from the keyboard.
I've done hundreds of taxiways since FS2k2 and have no idea why it all-of-a-sudden don't work using FS9/AF221
Thanks for any suggestions
Bill
