Hi Javasaigon.
There is your code:
Sub Bug_FieldChange(FieldName)
On Error Resume Next
If FieldName = "BG_STATUS" then
if Bug_Fields.Field("BG_STATUS").Value = "Fixed" then
Bug_Fields.Field("BG_USER_06").IsRequired = true
else
Bug_Fields.Field("BG_USER_06").IsRequired = false
end if
end if
On Error GoTo 0
End SubBr, Tomas