COM issue from a thread

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VS2005

Visual-Studio

COM

Hi,

I am encountering a strange issue. Here is the jist of my code :

main_thread()
{

// create connection point

// save COM pointers in a map

// wait on a lock

// call fn1() which uses the map of COM pointers
}


connection_point_callback()
{
  // initialize COM with CoInitialize

  // call fn1() which uses the map of COM pointers

  // release the lock
}

In the above code, connection point call back function first calls fn1() and fails to send data from that. How-ever after it releases the lock, fn1() is called from main-thread and it successfully executes. i am using global interface table for transferring COM pointers between threads. I am not sure what else is going wrong. Please help me with your suggestions.

Thanks,
Shishir