Possible to Hypnotized and not able to mentally visualize objects

I find hypnosis files to not be effective. I cannot visualize objects or commands. I hear the words and understand what they want me to do, but cannot form images in my mind.

For example, the file commands to visualize a large pink cloud, and you are enveloped in the cloud. I understand the concept, but cannot create the image. I feel like this is preventing me from going further with various files. Anyone have suggestions on how to get past this?