Why does it say card access error when i put my SD card in my HD Photo Printer?

Every timme i put my 4 GB SD card in my HD photo printer it says card access error see user manual but i lost it does anyone know how i can make it work?
Update: and the SD card isn't locked
Update 2: it is a HP photo smart 335
Update 3: and it does allow SD cards because the other SD card i put in showed photos but the next 2 didn't
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