4D smart cart station

Rose Pryor
 

I installed the cd with the 4D file assistant program on it.  The card station worked yesterday, but today it says there is no card in the station. I have the card in, and I tried various cards.   Yesterday, I saw a green light when I put the card in. I don't see that today.  what happened?  Anyone know what I should do?   I'm trying to give my granddaughter my old machine and design cards. 
Rose 

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