mgf

can you help me i got i avic f40bt and it hangs in a loop if i turn on my power then i see my pioneer logo and then its say's put in sd card if i do that then it say's wrong sd card this is what i did i downloaded a update for my maps then i put in the sd card i saw that he updated something for 2 seconds and then the error appears wrong sd card ! what can i do because nothing works anymore i'm from the Netherlands with regards , Kees

please help me my pioneer doesn't work anymore i downloaded a update maps for my f40bt right now it hangs in a loop if the f40bt starts up with the logo and then it says put in a sd card i usen a sd card for the update but it fails what can i do could somebody help me because nothing works right now with regards , Kees from the Netherlands