AppleShare 4.0 is not compatible with ARA MultiPort Server. AppleShare 4.0 is compatible with the ARA Personal Server and ARA Client products.
AppleShare 4.0 and ARA MultiPort Server both use the Apple Shared Library Manager (ASLM). However, AppleShare 4.0 uses version 1.0 and ARA MultiPort Server uses version 1.1. Because ASLM 1.1 is not backward compatible with ASLM 1.0, AppleShare 4.0 and ARA MultiPort Server cannot run on the same server.
ARA Personal Server and ARA Client do not use ASLM, so they are compatible with AppleShare 4.0.
This incompatibility has been fixed with the release of AppleShare 4.0.1 and greater, an upgrade of AppleShare is recommended.