AddOn DI Connection

Hi.

After update to 9.2 pl04 in B1, we have this error when try to connect DI/API AddOn:

"add-on has already logged on with the same account in " (other machine, or the same machine)

But we have 8 different AddOn on the client, but only 2 or 3 can connect at the same time ... the other not connect ... I try to use a different user account, but without success