sysinfo cannot detect a partition

When I click on MyComputer (sysinfo :/) one of my ntfs partitions is not listed there. It is mounted and available in the root directory but not in the sysinfo window. How could I fix this?
Second, my Windows Vista directory is impossible to be mounted. Says something that the Windows OS is in use and has locked the partition. In fact Windows is not running at all.
I use openSuse 11.0 and I am a new recruit to Linux.

Thank you