Dual-boot Ubuntu cannot access the Windows drive that it was installed on with wubi

I had Windows with two drives C: and D:. In the drive C:, I have my Windows. In the drive D:, I had my all other files and data. I installed Ubuntu in the drive D:, without deleting any data from it. So when I boot my laptop, in boot menu I see both "Windows 7" and "Ubuntu". When I boot up with Ubuntu, it works well, but I don't have access my data in drive D: (where I installed Ubuntu) anymore, but when I boot up with Windows, I have access to it. How can I have access my data in drive D: from Ubuntu? This is some information: sky@ubuntu:~$ sudo fdisk -l [sudo] password for sky: Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x2f56f4c5 Device Boot Start End Blocks Id System /dev/sda1 * 21585920 21790719 102400 7 HPFS/NTFS/exFAT /dev/sda2 21790720 144670719 61440000 7 HPFS/NTFS/exFAT /dev/sda3 144670782 625141759 240235489 f W95 Ext'd (LBA) /dev/sda5 144670784 562580234 208954725+ 7 HPFS/NTFS/exFAT /dev/sda6 562581504 617027583 27223040 83 Linux /dev/sda7 617029632 625141759 4056064 82 Linux swap / Solaris sky@ubuntu:~$ df Filesystem 1K-blocks Used Available Use% Mounted on /dev/loop0 10698000 3015236 7116288 30% / udev 1947220 4 1947216 1% /dev tmpfs 782716 880 781836 1% /run none 5120 0 5120 0% /run/lock none 1956788 156 1956632 1% /run/shm /dev/sda5 208954724 114865916 94088808 55% /host sky@ubuntu:~$ sky@ubuntu:~$ cat /etc/fstab # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # proc /proc proc nodev,noexec,nosuid 0 0 /host/ubuntu/disks/root.disk / ext4 loop,errors=remount-ro 0 1 /host/ubuntu/disks/swap.disk none swap loop,sw 0 0 sky@ubuntu:~$