Decoding of AMF message failed. Error is : Externalizable parsing failed: java.lang.OutOfMemoryError

Hi,

I am getting the error "Decoding of AMF message failed. Error is : Externalizable parsing failed: java.lang.OutOfMemoryError" while replying the script in Vugen.

I have tried below options but dint work though.

1. Included FlexJvmParams=-Xmx128m in  [FLEX_RO]

2. Turned off  DEP completely

3. Updated to JRE 6

4. Updated FlexJvmParams=-Xmx128m in default.config file in script folder as well

5. Tried increasing the memory but still getting the same error

I am using 11.04.00 version, 

Protocol: Flex, Web(Http/Html)

Below is the detailed Error

Error: Decoding of AMF message failed. Error is : Externalizable parsing failed: java.lang.OutOfMemoryError: Java heap space
at java.lang.StringCoding$StringDecoder.decode(Unknown Source)
at java.lang.StringCoding.decode(Unknown Source)
at java.lang.StringCoding.decode(Unknown Source)
at java.lang.String.<init>(Unknown Source)
at java.io.ByteArrayOutputStream.toString(Unknown Source)
at hp.flex.HPExternalizableWrapper.ReadObject(HPExternalizableWrapper.java:254)

Help would be much appriciated. Thanks in advance.