PNG to SGV

I am using Photoshop Elements to retouch a purchased PNG file. I reduce the file size to 2.44M 800 pixels by 1067 pixels. I am trying to convert the PNG file to a SVG file for use with a vinyl cutter. When I send it through the converter (Convertio) it converts to a black and white file. No color. Am I doing something wrong in Photoshop? I have used the Convertio program with many PNG to SVG files with no problem. I just am unable to figure this one out. Any help would be appreciated.

Moved from Using the Community (which is about the forums) to the correct forum... Mod
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