Trigger on a choice field

Hi to all

I have a button perfectly functioning on a table with this formula:

let x := dialog("Edit", "Edit Release", ["No", "Yes"]);
if x = "Yes" then
    let xCurrRec := ID;
    let xReleaseNumber := 'Release Number';
    let xArtistID := 'Artist ID';
    let xReleaseArtist := 'Release Artist';
    let xRelease := Release;

let myRecord := (select Release where 'Release Number' = xReleaseNumber);
    myRecord.('Release Number' := xReleaseNumber);
    myRecord.('Artist ID' := xArtistID);
    myRecord.('Release Artist' := xReleaseArtist);
    myRecord.(Release := xRelease);

openTable("Release", "myRecord")
end

I would like now to set these instructions on a trigger of a choice field called: Tools

I added the same formula with a new first line:

 if Tools = 3 then

let x := dialog("Edit", "Edit Release", ["No", "Yes"]);
if x = "Yes" then
    let xCurrRec := ID;
    let xReleaseNumber := 'Release Number';
    let xArtistID := 'Artist ID';
    let xReleaseArtist := 'Release Artist';
    let xRelease := Release;

let myRecord := (select Release where 'Release Number' = xReleaseNumber);
    myRecord.('Release Number' := xReleaseNumber);
    myRecord.('Artist ID' := xArtistID);
    myRecord.('Release Artist' := xReleaseArtist);
    myRecord.(Release := xRelease);

openTable("Release", "myRecord")
end

end
 

but now nothing is working.

Any suggestions?

Thank You in advance