NTFS partition not recognized

I have got Ubuntu installed on Disk 0, XP (C on 80GB partition, DATA (F on 287GB and new WIN7 (E 97GB partition (all NTFS) on Disk 1 and I'm trying to install Windows 7 RC in this new WIN7 partition

1. restarted PC with Win 7 DVD
2. followed instructions on Install Windows page
3. “get important updates for installation� has not popped up ?????
4. accepted terms and conditions
5. selected custom (advanced)
6. select E:
7. clicked next
8. pops up with warning: � Set up was unable to create new system partition or locate an existing partition. See the Setup log files for more info�

XP can access drive E: without any problem, the same Ubuntu and many other Linux distributions. What’s wrong?

Hello,
As I wanted to install Windows 7 in a new NTFS partition I followed Step 3 Point 1 which says: "... you want to install RC on another disk partition, restart your computer with the installation disc in your DVD drive ..." I always ended up this the error: � Set up was unable to create new system partition or locate an existing partition. See the Setup log files for more info�.
When I started the installation under XP than I could follow up all the points after 1 from step 3 without any problems.
Good luck with all installations on specially prepared partitions.
Regards
Lawrence