Try this :
Solution: Error 1555 Internal file number does not match position
This problem can be resolved by running CHKDSK /F on the affected drive. Sometimes it must be run multiple times to resolve this error. If running under Windows 2K/XP a CHKDSK can be run from the recovery console to fix files that may not otherwise be fixable.
Problem Description:
Error 1555 Internal file number does not match position
Error 1555
Problem Environment:
PartitionMagic
VolumeManager
ServerMagic
PowerManage Suite
DriveImage
Windows 2000
Windows XP
Windows NT
Windows 9X
Cause(s) of the problem
The file number stored in the header of an NTFS file does not match the file`s position in the file table.