The card is a tight fit when inserted for the first time.
Assuming you are inserting it the correct way round it might be that the male connector inside the pc has moved out of alignment. Can you shine a torch in the slot and see if anything is blocking the card? You should just see a black connector at the end of the slot. If the connector is pointing any way other than straight towards the opening you will need to open a case with Vaio Support (Link) to get it sorted.
The MCA is correctly inserted. Card SD is correctly inserted. I need to know, exactly, the link from I can download the controllers of the MCA to see if it works. In addition, I need the compatible SD card list.
