Just installed Mint14 on a 500GB drive. After some GRUB problems I am pleased to say everything is working fine

Everything but for a small detail. The hdd where mint is installed is divided into 4 partitions: two where windows8 is installed (one is/was) and another for the boot (I guess) and the other two are the ext3 and the swap for Mint. The thing is, my data is all on the windows partition that I had planned on using as a document partition after installing Mint, and I can't acces it.
Nautilus returns the following message after I try opening the windows ntfs partition:
"no object for d-bus interface"
Can you guys give me help here on what's wrong?
Thanks