OS Selector Drive Letter Mismatch

Hi,
I've got a problem with OSSelector (DD 11 2343), after a restore with TI 2011

I've got 4 Harddrives with 2 OS (Win7)
Drive 1 - C: Win7 (OS1)
Drive 2 - D: Data
Drive 3 - E: Backup
Drive 4 - Partition 1 - Win7(2) (OS2) - Partition 2 - F: Temp

In DD is no Drive Letter assigned to Drive 4-1 - OK.
in OSSelector it looks as follow:

for booting Win7

C: Win7 active
D: Data
E: Backup
F: Temp
G: Win7(2) active hidden

or
for booting Win7(2)

#1-1: Win7 active hidden
D: Data
E: Backup
F: Temp
G: Win7(2) active

when I try to boot into Win7(2) it doesn't work, cause the drive letter G: assignment issn' correct.
It has to be C:
Is there any help, without reinstalling?
Thank you
Marianne