Problem installing Ubuntu 13.10 on Windows 8 laptop

[nisargshah]

I have a laptop with the following partitions -

http://s10.postimg.org/4x2bqjk2x/pic1.jpg


I reserved the last partition for Ubuntu 13.10. But when I try to install Ubuntu from a live USB, the installation wizard does not recognize the partitions. Here's an image -

http://s17.postimg.org/4xht8mx6n/WP_20131105_003_1.jpg


Please help me out with this problem.
Laptop - Dell Inspiron 15.