You have reached maximum number of concurent users for your lankpak

I'm getting an error above metioned, even I tried to log to sample DB,


I got a message suddenly " you don't have license to use this product"

Then I tried to repair the accpac then I'm getting " You have reached maximum number of concurrent users for your lankpak "


We have Certificate Client ID it has 8 Digits, in the doc its syys 7 digit or 10 digit. can't understand.