Not sure as to the cause of this issue, but believed to be related to Windows 7 and later Sandbox. Older versions of windows as well as current versions, may be issues with either the sharing or the .MDB file

1 Ensure the that the Cyrious SMS short-cut on the client machine is a shortp-cut and not the executable. If it is the executable, replace with the short-cut

1 Check to ensure sharing is correct

2 Replace the SMSStoreData.mdb file and reshare

1. Download jet40sp8_9xnt.exe
2. Install on computer