Floating licence


I have a licence problem. I have a floating licence for the D-Loft tool.

I released this licence for a day for a colleague to use.

I am now trying to get it back, but even after my colleague has released the licence, it still doesn’t work and I have the following message :

"All floating licences for the serial number are currently checked out to :
###my colleague’s computer###

Sorry you don’t have any valid licences."

Do you have any idea ?