Importing/Updating table from Excel

Hi All,
First post here..(newbie)
I have an import from Excel into a user_table, problem is that (just found out..) when user x has a related filed in comp_table the updated record is not imported.
This is the code I use now:

Code:

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DoCmd.CopyObject , "Deelnemer_copy", acTable, "Deelnemer"
 DoCmd.SetWarnings False
 DoCmd.RunSQL "Delete * from deelnemer"
 DoCmd.SetWarnings True
 
 ImportFile = Application.CurrentProject.Path & "\Deelnemer.xls"
 DoCmd.TransferSpreadsheet acImport, acSpreadsheetTypeExcel3, "Deelnemer", ImportFile, True

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How can I remove the RI, so this record can be updated ?
Then restore the RI ???
Have been reading a lot but can't find the solution..
Please help..