Im using the code below and I have the default set to "Yes". This block of code is straight from the readme-file, so Im not sure why that doesn't work for you.
If you have the same, what happens if you change the code marked red from = to <>?
<% if strAUAnon = "1" then
response.write " <tr>" & VBNewLine & _
" <td bgColor=""" & strPopUpTableColor & """ align=""right"" valign=""top"" nowrap><b><font face=""" & strDefaultFontFace & """ size=""" & strDefaultFontSize & """>" & fLang(strLangMOD_Ls3kAU_04000) & " <br>" & fLang(strLangMOD_Ls3kAU_04010) & ": </font></b></td>" & VBNewLine & _
" <td bgColor=""" & strPopUpTableColor & """ valign=""middle"">" & VBNewLine
if RS("M_AUHIDE") = "1" or trim(RS("M_AUHIDE")) = "" then
response.write " <font face=""" & strDefaultFontFace & """ size=""" & strDefaultFontSize & """>" & fLang(strLangMOD_Ls3kAU_04020) & ":</font> <input type=""radio"" class=""radio"" name=""AUHide"" value=""1"" checked>" & VBNewLine & _
" <font face=""" & strDefaultFontFace & """ size=""" & strDefaultFontSize & """>" & fLang(strLangMOD_Ls3kAU_04030) & ":</font> <input type=""radio"" class=""radio"" name=""AUHide"" value=""0"">" & VBNewLine
else
response.write " <font face=""" & strDefaultFontFace & """ size=""" & strDefaultFontSize & """>" & fLang(strLangMOD_Ls3kAU_04020) & ":</font> <input type=""radio"" class=""radio"" name=""AUHide"" value=""1"">" & VBNewLine & _
" <font face=""" & strDefaultFontFace & """ size=""" & strDefaultFontSize & """>" & fLang(strLangMOD_Ls3kAU_04030) & ":</font> <input type=""radio"" class=""radio"" name=""AUHide"" value=""0"" checked>" & VBNewLine
end if
response.write " </td>" & VBNewLine & _
" </tr>" & VBNewLine
end if %>