need solution for uploading problem

we are using one file witht the name chasefileupload.asp and we do uploading process. But while uploading most of the times we faces the following error .
Microsoft VBScriptruntime(0x800A0005)
Invalid procedure call or argument: 'MidB'
POST Data:
error '80020009'
Exception occurred

I lack to put enctype="multipart/form-dates "in tag form from the form

greetings

Excuseme

put enctype="multipart/form-data"

in tag form