I'm going to assume you have 3 partitions then? 1 for vista 1 for user data and 1 with Suse Linux (not counting the swap partition of course)

You probably need to format the partition you created with Vista, if you right click on my computer and go to manage, there's a disk management console in the tree within the window that appears, you should be able to see that extended partition and format it to ntfs (or whatever filesystem you want)

If it's just 2 partitions, Vista and SuSE linux, you won't be able to view the Linux partition as Vista doesn't support the ext3 or ext2 filesystem automatically, there are 3rd party solutions, such as ext2ifs that will install the driver needed to view and access the linux partition.