Entry Point Not Found The procedure entry point "dmAPP_isUnlockedVIDPID"

Hello, I am having a "Entry Point Not Found The procedure entry point “dmAPP_isUnlockedVIDPID” could not be located in the dynamic link library dmBackup.dll problem. When I try to open files on my SanDisk USB 8GB flash drive. This started the last time I exited the disk and believe I didn’t right-click hardware device and click eject. No when I plug it in, I get the msg. Any ideas on how to fine the entry point again? Thanks in advance, pc.

Running CHKDSK on the drive may help.

Run CHKDSK from cmd promt and/or in safe mode? OS Windows 7, tks in advance. I was also thinking I might need a new VID/PID if the current one is corrupted. Ideas?? I also have another new one flash drive just like this one, still in package, but didn’t want to use until I can figure out a solution to fix this problem first.