If you do not use a server, but several computers use Accowin/Belcofin/Finasset, it may happen that if you go directly to the location where the programme is located via you will get the message that the ID is not correct. In this case, all computers should create a network drive with the same drive letter. 

For example, instead of using \nas\Accowin , they should use p:Accowin.