请ASP高手帮我查一下错误

userID = Request("um")
servid = Request("servid")

if servid<>"" then
if Instr(1,servid,",",1)<>0 then
'有多个项目服务，转向第一个
tmp = Split(servid,",")
serv0 = tmp(1)
len = UBound(tmp)+1
servstr = ""

For i=1 To len-1
servstr = servstr + "&servid=" +tmp(i)
Next

select case serv0
case "1"
Response.Redirect "http://www.gdcic.net/receive.asp?um="+userID+servstr
Response.End
case "2"
Response.Redirect "http://photo.gdcic.net/Receive.aspx?um="+userID+servstr
Response.End
case "3"
Response.Redirect "http://www.gdcic.net/receive.aspx?um="+userID+servstr
Response.End
case else
end select
end if
end if