string > 16 characters

Hi there,

   here is my code:
   
   {
      const_form_iterator sValue = cgi.getElement("sValue");
      if (...)
      {
         string str = **sValue;
         ...
      }
   }
   
   here is the problem:

   everything works correct, but if string value > 16 characters
   next assert fails (dbgheap.c):
   
        /*
         * If this ASSERT fails, a bad pointer has been passed in. It may be
         * totally bogus, or it may have been allocated from another heap.
         * The pointer MUST come from the 'local' heap.
         */
        _ASSERTE(_CrtIsValidHeapPointer(pUserData));

   what I did wrong, and what should I do?

   N.B. all strings < 16 characters works good!
-- 
Best regards,
 Vitaliy                          mailto:[email protected]