Probably your active partition is not a NTFS one, maybe one of the OEMs is set to active instead of the Windows partition. Go to MMC / Disk Management and right click on the partition where you want to install Windows 7 x64 and make it active. I also sugest you to delete the OEMs or, if not possible, mark them as not active (after installing Win7 x64 you'll be able to delete/integrate them to another). Boot from Win7 x64 DVD and try to install again. I hope it helps.
No the windows partition is NTFS and active. I must say that for the moment I only can start up with the daz recovery iso . (windows loader default method - already for more than 6 months). So I wonder at the first reboot during the installation it asks to boot from dvd ,do you have to continue from the dvd or if not what happens ? Or maybe my keyboard didn't work ? Or I thougt if you do a clean install the boot cyclus would be ok again ! I'm rather confused and hope for some suggestions ! thnx a lot.
* Make sure Acronis doesn't have it's own partition thats marked as active. * The partition that needs to be cleared is the one thats marked as active in disk management. I would recommend you delete the OEM partitions + Windows 7, merge the partitions to regain space and then install Windows 7 onto that single partition.