Purchase Order Print Format Can not be saved

Hi,Everyone

After I designed the print format of PO and save,an error accured as follow:

1). [Microsoft][SQL Native Client][SQL Server]SQL Server detected a logical consistency-based I/O error: incorrect checksum '' (RITM) (expected: 0x64af44cb; actual: 0x64a944ce). It occurred during a read of page (1:7645) in databas

and Only PO print format can not be saved.Can somebody help me,thanks a lot.