AllSync & AllDup

Hello,
i have Allsynch scheduler 2.6 business edition
i have regulary this message while copiying my files :
"ERROR: The permissible license quantity of 1 has been exceeded. Please increase the license quantity at least to 2 licenses."
what does it mean ?
thanks

With one license you can transfer data between two devices with different IP addresses. The number of licenses has to be increased by 1 for each additional device with an individual IP address in the network with which data transfer takes place:

• - Data transfer between 2 devices in a network with different IP addresses = 1 license
  - Data transfer between 3 devices in a network with different IP addresses = 2 licenses
  - Data transfer between 4 devices in a network with different IP addresses = 3 licenses
  - ...

Information about the license modell of AllSync: http://www.allsync.biz/help/a_lizenzmodell.htm