Dblookup on web is not working

Hi ,I am having a field where i am uisng dblookup , it is working fine in client , but in web i am getting following error. pls advice me the reason for that. pls don’t that the view is available to public access.

"HTTP Web Server: Lotus Notes Exception - You are not allowed to modify fields in this context. "

and also i am using the below mentioned formula in my lookup field.

FIELD sbu_k1:=sbu_k1;

res:=@Trim(@Unique(@DbLookup(“”:“Nocache”;“vvvmcert/vvm”:“oppmgtsys.nsf”;“(sbuview)”;sbu_k1;2)));

@If(@IsError(res);“”;res)

regds

soma

Subject: dblookup on web is not working

I think the view you are using is a private view.Make it public and see weather this works or not.