Recording performance test script for SAS Marketing Automation using HP Load Runner (Java web app)

I am having a few issues recording a performance test script using HP Virtual User Generator, in particular for the SAS product MA (Marketing Automation). I am simply trying to record the login scenario initially.

I solved initial issues by importing in SAS specific jar files as the script was trying to build SAS specific objects, as well as having to import flex jars for the Action Message Format messages.

See attachment for jars I have imported.

I have also made sure that HP VuGen is running the same java version as the SAS application (jre 1.6 update 30)

I am still getting errors on a few amf calls. Please check attachment for error list.

I have noticed I only get these errors on flex_web_requests like this one:

flex_web_request("amf_5", 
  "URL=http://rtmarketingops-acc.europe.shell.com/SASCIStudio/remote/"
  "messagebroker/amf", 
  "Method=POST", 
  "Resource=0", 
  "RecContentType=application/x-amf", 
  "Referer=http://rtmarketingops-acc.europe.shell.com/SASCIStudio/"
  "sas.ci.shell.swf", 
  "Snapshot=t53.inf", 
  "Mode=HTTP", 
  "EncType=application/x-amf", 
  "BodyBinary=\\x00\\x03\\x00\\x00\\x00\\x01\\x00\\x04null\\x00\\x03/"
  "11\\x00\\x00\\x01%\n\\x00\\x00\\x00\\x01\\x11\n"
  "\\x81\\x13Oflex.messaging.messages.RemotingMessage\\x13operation\r"
  "source\\x13messageId\\x13timestamp\\x0Fheaders\t"
  "body\\x11clientId\\x17destination\\x15timeToLive\\x063getCurrentBusine"
  "ssContext\\x01\\x06I228F1964-9320-DA68-68A0-A689B4CEC726\\x04\\x00\n"
  "\\x0B\\x01\\x15DSEndpoint\\x06\rmy-amf\t"
  "DSId\\x06IED9326C5-161F-9FBD-697F-56D6EC105A28\\x01\t"
  "\\x01\\x01\\x01\\x06)BusinessContextProxy\\x04\\x00", 
  LAST);

 If anyone could give me any insight into this problem, would really help me.

Thanks.