Have you tried:
- a show interface gi1/0/25 capabilities to see if the switch recognizes the SFP?
- checked that the SFP type works with the fiber type you are trying to use?
- The fiber path in properly patch and consistently the same type of fiber?
- The switch on the other end has a compatible SFP as well?
- some interfaces allow speed changes to be configured, you might check that the switches are configured the same on both sides. 

I took a short LC and flipped the TX - RX, so that I can default the interface do a no shut, then plug in the tester to two interfaces on the same switch.  That will eliminate the other switch and the path if the link doesn't come up. 

How to Enable Ports 25 - 28 on a Cisco Catalyst 3750
I have used AjaxFileUpload to upload multiple image files. Now i want to store the uploaded images inside rootfolder>subfolder. 

The rootfolder is in the name of the user.
The rootfolder is created dynamically by taking the session of the user who has logged in 
Like this:  

string username = Session["username"].ToString();


I am able to create this folder and save images in it. but i want to save it in subfolder.

the subfolder is also created dynamically but this time i have to take the value(id) from the database and name the folder by that id name. (this is so that i can refer to the database)

I know how to create a new folder using Server.MapPath();
Here is the code for it in brief

using System.IO
if (Directory.Exists(Server.MapPath(uploadPath))) return;
else Directory.CreateDirectory(Server.MapPath(uploadPath));


where uploadPath is the folder's name i want to create dynamiclly.

but how do I include the subfolder too in my Server.MapPath() so as to make my path as rootfolder/subfolder ?

Small example to make the question understandable.
I am a seller. I have posted 4 ads online.
Now when i am posting my 5th ad i want to include many images. 
these images should be saved in the folder 

Seller/5/imagename.jpg. 
(where Seller is the username(main folder), 5 is the advertID in the database and the name of the subfolder)

How do i do this? Please help.
I am using asp.net c# 
