C++ Calling function that has template which has inheritance -

After

Then I have a class that defines a TileGrid:

  of the template & Lt; Typename t & gt; Square tilegrid {...};   
 I fill the template with a class named  ImageTile   
  ImageTile {...};   
 I have a child class of  ImageTile  that I have defined that looks like this:  
  class FFTWImageTile: public ImageTile {...};   
 In a separate file I define the following function:  
  Zero writeDataToFile (TileGrid & Image; ImageStitching :: ImageTile & gt; * Grid, std: : String file name);   
 (Note: Both the  ImageTile  and  FFTWImageTile  are in the Image Stitching location)  
 All of the above are now Just fine, but when I try to use it I get an error.  
 Here is an example test case that is using it:  
  Namespace = Image Stitching; TileGrid & LT; Is :: FFTWImageTile & gt; * Grid = new tilegrid & lt; Is :: FFTWImageTile & gt; (...); WriteTranslationsToFile (grid, "output.txt");   
 When the trial case I get the following error compilation:  
  error: can not change ???? TileGrid & LT; ImageStitching :: FFTWImageTile & gt; * One ???? For Tula Grid & lt; Image Stitching :: Imagatile & gt; * One ???? One for logic Zero writeTranslationsToFile to (; ImageStitching :: ImageTile> TileGrid & lt *, std :: string) a ????   
 Anyway I can do this in C ++ ??  
 Edit:  
 Each person has the answer that I am working on it. Was extraordinary and the solution to each submitted problem I think has been decided to move to C ++ 11 and use an emphasis for this particular case. In the future, I think I will add a template to the function and be sure to get the data in this way. Thanks to all for help! I have marked that what I think is the best answer, although each is acceptable.   
 
 
 You are getting the error that despite  FFTWImageTile   ImageTile < / Code> because,  TileGrid & LT; FFTWImageTile & gt;  and  TileGrid & LT; ImageTile & gt;  are perfectly unrelated classes.  
 How it can be decided depends on the implementation of those classes which you have not shown. You may create  writeDataToFile ()  templated:  
  template & lt; Typename T & gt; Write zerodatafile (tilegred  * grid, std :: string fileName);