No licenses or Trial Licenses Left

Our Intel Imacs can no longer open the client.
Error: “No licenses or Trial Licenses Left”
OS 10.4.7
Java Runtime Edition 1.5

Our Windows XP and 2000 machines work fine. We have plenty of licenses

Just upgraded Servoy to v3.1.5, Server is Windows XP. Note: The upgrade did manage to wipe out the client license number, so I re-entered thru the web admin

The Server Log shows this cryptic message, for the IP address of one Intel Mac:
2007-05-30 09:18:04,437 ERROR [RMI TCP Connection(2)-192.168.1.101] com.servoy.j2db.dataprocessing.ClientManager - java.rmi.ConnectIOException: Exception creating connection to: 192.168.1.101; nested exception is:
java.io.InterruptedIOException: The socket pool for a client 192.168.1.101:3000 did not recieve a callback socket from the client within 60000ms, pool still empty
2007-05-30 09:18:06,921 ERROR [ClientExportNotifyListner[0]] com.servoy.j2db.util.Debug - Signalling channel lost, removing ports: [3000]
java.io.EOFException
at java.io.DataInputStream.readInt(Unknown Source)
at com.servoy.j2db.util.a.d$1.run(Unknown Source)
2007-05-30 09:18:06,921 ERROR [ClientExportNotifyListner[0]] com.servoy.j2db.util.Debug - Signalling channel lost when reading pings or client export notifies, removing ports: [3000]

I see this question posted all over, but with no one clear solution

thanks
greg

found the problem

a few months ago, the IT dept blocked ports 3000-3999, for some MS Office issue

it appears that Intel IMacs now need these ports to connect (sevoy client did work before)

go figure

greg