some problem about access database in ASP site

[JEFFzuo]

I'm not a web developer, but my classmate want me to create a bbs for them, so I download a sample.
when I use it, some problem appeared. the information is refered by IE:

Microsoft JET Database Engine (0x80004005)
Operation must use an updateable query.
/our_bbs2/inc/char.asp, line 236

in the file, code is the following:

set rs=conn.execute(sql)
if rs.eof and rs.bof then
ComeFrom=""
actCome=""
sql="insert into online(id,username,userclass,ip,startime,lastimebk,boardid,browser,stats,actforip,UserGroupID,actCome,userhidden) values ("&statuserid&",'客人','客人','"&Request.ServerVariables("REMOTE_HOST")&"',Now(),Now(),"&boardid&",'"&Request.ServerVariables("HTTP_USER_AGENT")&"','"&replace(stats,"'","")&"','"&Request.ServerVariables("HTTP_X_FORWARDED_FOR")&"',7,'"&actCome&"',"&userhidden&")"
else
sql="update online set lastimebk=Now(),boardid="&boardid&",stats='"&replace(stats,"'","")&"' where id="&cstr(session("userid"))
end if
conn.execute(sql)

Someone can answer my problem?

[qdubit]

程序提示char.asp的第236行有问题呀，请问236行是什么呀？

[angelheavens]

HeHe...,English is too bad!

I hope that you can try it:
id="&cstr(session("userid"))

but below sentence modify:
id='"&cstr(trim(session("userid")))&"'"

[tigerwen01]

try:
rs.open sql,conn,1,3

[JEFFzuo]

I think this problem is not wrong of source code, because i download other project, same problem is appearance. Help!!