this section has no staring if statement...but without running your default,asp i cannot checkit.
you need to recheck your code that u have added
line 599
ElseIf (arrSubInfo(4) <> "") Then
Response.Write "<td bgcolor=""" & strForumCellColor & """ align=""center"" valign=""top"" nowrap>" & _
"<font face=""" & strDefaultFontFace & """ color=""" & strForumFontColor & """ size=""" & strFooterFontSize & """>" & arrSubInfo(4) & "</font></td>" & vbNewLine
Else
Response.Write "<td bgcolor=""" & strForumCellColor & """ align=""center"" valign=""top"" nowrap> </td>" & vbNewLine
End If
there maybe more problems after this section but i just highlighted this specific if statement
this maybe a place to start