This first message is expected. See this post for help with jar signing:
viewtopic.php?f=6&t=20042The second message could be solved by making a change to the Java settings on the client computer. On the client computer, check the following:
1) You are running the most up-to-date version of Java.
2) There is only 1 version of Java installed (most likely the case for a Mac, but not always the case for Windows).
3) Your rmi port is not blocked by a firewall (1099 by default).
4) In some cases, setting Java's proxy setting to 'Direct Connection' fixes this. The setting can be changed in the Java control panel (found in the Utilities folder on a Mac). On the 'General' tab, click the 'Network Settings' button.
5) Clear your Java cache also. In the Java control panel on the 'General' tab in the 'Temporary Internet Files' section, click the 'Settings' button then click the 'Delete Files' button. Be sure to check all check boxes.
I hope this helps.
Steve in L.A.