I see someone posted a similar question below, but my problem seems to be not as complex. First of all, I'm using Disk Director Suite version 10.0 build 2089. I have a 200GB drive with one primary NTFS partition of about 177GB, and a small FAT32 one for system recovery that's about 8.5GB. I tried to split the main one to give me another NTFS partition of around 15GB. It seem to do everything as usual, but it either shows an undefined error, or it goes all the way, but the new partition doesn't show up once WinXP boots. I an assigning it a letter, but I don't think that matters anyway. Has anyone else had a problem like this?