Can I use MKL functions with user allocated data

Hey 

Is there a problem using MKL with user allocated data ?

I'm trying to use MKL function 

   vcMulByConj(...)

with continues memory allocated using OpenCV mat object. (with I believe it's implemented with "new" c++ operation)  

I frequently receive an access violation exception.  

Is there any problem with my memory model ? 

Best 

Shahar