The problem is that the Crystal Reports runtime continues to look for the report files on the C: drive, even though that drive does not exist, and it reports in the log files that it is looking for the reports on the correct drive letter.
To work around this issue, you will need to map a drive for the C: drive to point to your actual drive.
If you don't know your computer's machine name, right click on the My Computer icon and go to Properties, then to the Computer Name tab. On the Full computer name: line, we need everything up to the . For example, if it says jason.wasp.com, we just need to know "jason". Also for this example, we will use I: as the existing drive.
To map the drive, open your My Computer icon, then on the Tools menu select Map Network Drive. For Drive, select C:. If you don't see C: as an available choice, that letter may have been assigned to a removeable drive in the Disk Management component of Computer Management. Change that drive to another letter; then C: will be available for mapping.
In Folder, type \\<machine name>\I$. Using the above example of "jason", that would be \\jason\I$