Security Exception: uploading excel file on server

[theprowler]

Hi everybody,
I've got a security exception performing an upload operation:

1. i want to store an excel file on my wpresources folder on server (and here is the problem)
2. i want to read some data on this excel file
3. i want to delete this file from server

I'm currently using WSS_Medium trust policy but it doesn't works...
Setting in web.config "trust=Full" all works so i guess i have to add a permission in my WSS_MediumTrust file...

Any ideas?

Thanks in advance!

 

[theprowler]

I've noticed that the problem is not in saving file, but in reading data from excel through oledb...

Here's some code

'uploading file...
Try
selectedFile2.PostedFile.SaveAs(uploadPath)

Catch ex As Exception
lblErr.Text = "Error from importing excel file"
Exit Sub
End Try


'Connecting to excel file through oledb...
Dim excelConnection As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data

Source=" & uploadPath & ";Extended Properties=""Excel 8.0;HDR=Yes""")
'open connection
excelConnection.Open()

Any ideas?