Problem with multiattachments grid

Hello friends,

I'm struggling with multiattachments grid. My main goal is to present more than one attachment(send by email) in grid. At this moment i can present just one. I don't know why. Can someone give me small tip how to deal with this task? This is my code for attachments grid:

load(
local!documents: folder(tointeger(ri!request.folderId), "documentChildren"),
a!sectionLayout(
label: "",
contents: {
a!gridLayout(
label: "Attachments",
labelPosition: "ABOVE",
headerCells: {
a!gridLayoutHeaderCell(label: "Document Name")
},
columnConfigs: {
a!gridLayoutColumnConfig(
width: "DISTRIBUTE"
),
a!gridLayoutColumnConfig(
width: "DISTRIBUTE"
)
},
rows: a!forEach(
local!documents,
rule!AA_AttachmentsGridRow(
document: fv!item,
index: fv!index
)
),
selectionvalue: ri!request.advisorDocument_folder_id,


validations: {},
shadeAlternateRows: true
)
},
iscollapsible: true
)
)

+ the expression called "AA_AttachmentsGridRow"

a!gridRowLayout(
id: ri!index,
contents: {
a!linkField(
label: "name " & ri!index,
links: a!documentDownloadLink(
document: ri!document,
label: document(ri!document, "name")
)
)
}
)

this is how it look inside the process model 

and there is always one attachement no matter what