You could post error messages for better understanding what is going on.. One issue I found when running some samples was that textures were non power of 2 and it made blitz not to load texture and therefore giving some error in debug mode.
Fix for that is to resize textures to power of 2 ie. 256*256, 512*512 etc.
Fix for that is to resize textures to power of 2 ie. 256*256, 512*512 etc.