Flex Data services not working in Oracle AS or OC4J 10.1.3

I followed the instructions in the Install documentation but still can’t get the Data services to work in Oracle AS or OC4J 10.1.3. If I try to run Flex Admin I get an RPC fault“Send Fail, faultcode=client.error.messagesend faultdetail=channel.connect.fail error netconnection.call.failed: http: status 500 messageID=2907c199-e9be-8081-c279-423f593a7777. If I try to run the samples i either get a send fail Error or
1 Exception found.
Exception java.lang.OutOfMemoryError Java heap space. Increasing the heap size does not help. Does anyone have any suggestions?