9iAS with many OC4J Containers

Hello,
I am having a problem with a 9iAS farm. We've got an infrastructure (9.0.2 patched to 9.0.3) and on the Application Server we try to use more than 10 OC4J containers.
After trying to start the 10-th container, there is a timeout error:
dcmctl start -co OC4J_TMS1 -v
ADMN-906025
The exception, 806209, occurred at Oracle9iAS instance "servername.domainname.nl"
"The send operation timeout has expired and reached the specified timeout value
Inspect timeout value in the debug log, increase timeout or check opmn connection".
Resolve the indicated problem at the Oracle9iAS instance where it occurred then resync the instance.
This means that the Application Server AND the Infrastructure Server are unreachable.
I have to stop all the processes (opmnctl stopall) and start the first nine with the dcmctl tool. If I stop the processes on the Application Server, than the Infrastructure becomes available.
But everytime I try to start the 10-th .. it fails. I have tried to put a max memory java option into the OC4J-container but it didn't help.
We've got this problem on a machine with 768MB internal memory and one with 512 MB memory.
I tried to minimize the max memory with this option:
<java-option value="-Xmx24M" />
Anyone an idea?

Hi
We are running 4 JVMS on a machine with 8Gig of Ram. I do think givving only 24 Meg for each JVM will not even allow it to start(Open for correction here).
This looks like a terrible shortage of resources on the machine

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