file transfer in vb.net to a web server

file copy to web server ??
I am using the file copy command to copy jpeg images to a web server with a web forms project. the line of code is

FileCopy("e:\irean\ireanweb\pics\testbig.jpeg", Server.MapPath(""))

at this stage im just trying to put it in the main directory on the server

I can open the database ok using the connection string as follows

Public dbcConnection As String = "Provider=Microsoft.Jet.OLEDB.4.0;data source=" & Server.Mappath("ireantest.mdb")

however when I try to run it is says

The target directory already exists

the lines of code are
Line 85: gnAgentID = nID
Line 86: Label4.Text = "<b class=no2>Access Granted - transferring you to the Members Page</b>"
Line 87: FileCopy("e:\irean\ireanweb\pics\testbig.jpeg", Server.MapPath(""))
Line 88:
Line 89: Response.Redirect("frmUpload.aspx") '("members.html")

line 87 is the one with the error

would appreciate if anyone can help

regards
bh