I don't know if it's different in FMP 6; I am using FMPa 12.
But this might help:
Under the Navigation category select:
Go to Record/Request/Page
Then in the Script Step Options part, select First from the drop-down list.
but the recordset it's always all records, sorry for my english, instead of I would like to show only this
Could you set a variable of unique ID of the record you want to show on its own and then Perform Find for that variable?
yes I have a unique ID
Go to record/request/page [first]
Show all records
Show Omitted Only