I'm using the Vostro 1500 and when I plugged in a MemoryStick Pro into the memory card read (it supports this card), it shows up in My Computer but when I try to access it, it says Please Insert a disk into drive X:

Couldn't find any help online. Any ideas?

Edit: Mods please remove this question as I found out it was fixed after restarting and jiggling the card a little.