From the design view of the report, go to the property sheet and the Event tab. Find the On Load event and click the elipsis button. Select Code Builder if presented with the Choose Builder dialog. This will drop you into the VBA editor in the Report_Load event. Edit to look something like this:
Private Sub Report_Load()
DoCmd.TransferDatabase acImport, "Paradox 7.x", "c:\yourdata\yourfile.tbl", acTable, "SourceTable", "YourAccessTable"
End Sub
I'm not sure on the specifics for the Paradox version, the file naming convention, etc. (I only dabbled with Paradox briefly and don't remember it's specifics). Watch the intellisense or put the cursor on TransferData and press F1 to get the Help for the TransferDatabase method for reference.
Ahead of the TrasferDatabase statement you might want to run something like:
CurrentDb.Execute "DELETE FROM TableName"
That will blow out the destination table on the Access side ahead of the load from the Paradox side.