Rasterizing the file in Photoshop would be the 'traditional' solution to this problem. It is an imperfect fix (more of a work-around), as it will change spot colors to process color.
If you are using VersaWorks (only the current version 3.1.3), there is a brand-new color management Preset, called 'Full Page Converion Mode' that is designed to eliminate this specific problem. It is found in the Job Settings dialog, under the Quality Tab, in the Color Management Preset Listbox.
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