wcf with IIS 7 + create java virtual machine fails with heap memory allocation

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IIS5.1

IIS7

C++

C#

Java

.NET

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I met a big problem with an application that needs to initialize a java virtua machine. Let me explain: I have developed a wcf web service in C # and the framework 4.0 and in which I initialize a java virtual machine in order to communicate with java code with p/invoke call from a native c++ dll. When I use the ServiceHost object (from the framework.net) to host the service it works very well (the JVM is initialized here). But when I try to host my wcf service web in IIS5.1 or IIS7, the application fails and exit with any message. So i have turned on the debugging in visual studio at IIS Express,check allow unsafe code and i get the following exception: "Could not reserve enough space for object heap" which means that the java virtual machine can not be expressed initialized.

The application architecture is like this: code + c # wcf call a function with-> jniinterface and it is a c + + dll (p / invoke) ---> java library

could someone help me

thank you