Hello Fong,
CHKSYS.EXE is reporting errors (wrong tables and missing CPRE32.DLL) and you do not have the current service packs installed for OrderEntry and Receivables. Perhaps in cleaning up your system drive someone uninstalled an application that removed the CRPE32.DLL or failed to move some files around. Re-installing OrderEntry and/or Receivables should solve the problem.
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Andrew Bates