字段 'crm.mob' 不能是零长度的字符串的问题

[wudi002]

错误类型：
Microsoft JET Database Engine (0x80040E21)
字段 'crm.mob' 不能是零长度的字符串。
/IISHelp/crm/submitclient.asp, 第 33 行


浏览器类型：
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)

网页：
POST 176 ??? /IISHelp/crm/submitclient.asp

POST Data:
khmc=gdsg&lxr=&khly=%B5%E7%BB%B0%BF%CD%BB%A7&mob=&tel=&mail=&crmkind=%B3%C9%BD%BB%BF%CD%BB%A7&address=&fax=&product=%B0%AE%C6%D5%C9%FA%CD%B6%D3%B0%BB%FA&bz=&Submit=%CC%ED%BC%D3
CONN。ASP代码
<%


'connstr="Provider=Microsoft.JET.OLEDB.4.0;DATA SOURCE="& SERVER.MAPPATH("/dscs.mdb") &";Persist Security Info=false"
set conn=Server.CreateObject("Adodb.Connection")
conn.open "Provider=Microsoft.JET.OLEDB.4.0;DATA SOURCE="& SERVER.MAPPATH("crm.mdb")
%>

submitclient.asp 代码
<!--#include file="conn.asp"-->

<%
khmc=request.Form("khmc")
lxr=request.Form("lxr")
khly=request.Form("khly")
mob=request.Form("mob")
tel=request.Form("tel")
mail=request.Form("mail")
crmkind=request.Form("crmkind")
address=request.form ("address")
fax=request.Form("fax")
bz=request.Form("bz")
'time1=time()
product=request.Form("product")

set rs=server.CreateObject("adodb.recordset")
SQL="select * from crm "
rs.open sql,conn,1,2
rs.addnew
rs("gsname")=khmc
rs("lxr")=lxr
rs("khly")=khly
rs("mob")=mob
rs("tel")=tel
rs("mail")=mail
rs("crmkind")=crmkind
rs("address")=address
rs("fax")=fax
rs("bz")=bz
rs("time1")=date()
rs("product")=product
rs.update

response.Write("添加成功")



%>