Since AS7 you have more than one approach to call ejb's.
If you use something like "remote://..." in your code, this is not the recommeded way as there are several issues you see one of it.
You can use the programatic approach to set create a client context with a selector, or use the ejb-client.properties.
You can find the different possibilities in the docs.
If you have more questions please show a part of the relevant code
Hi Wolf-Dieter Fink,
thank you very much for your quick answer. We indeed use the "old" way of looking up our proxies. I am going to try to change it to the new approach.
Try one of the new approaches and post if you have issue