Right-Click the site from Site manager ,from the menu, choose Properties.
Click Type tab from the site properties dialog , choose Properties.
From Data Transfer type, choose Use Global Settings , Auto Detected or ASCII Binary.
From the menu, choose Tools > Options. The GlobalOptions window appears.
In the left pane, click ASCII Types.
In the right pane, enter the file extension for the file type you want to transfer in ASCII mode in the ASCII extensions box. If the extension is already in the list, proceed with the transfers.
Select Add.
Select OK.
Proceed with transfers.
From the menu, choose Tools > Options. The GlobalOptions window appears.
In the left pane select ASCII Types. A list of the file types that are transferred in ASCII mode will be displayed. If the file type you want to transfer is not displayed, select OK and proceed to step six. If it is displayed continue with step three.
Select the extension of the file you want to transfer in binary mode.
Select Remove.
Select OK.
Proceed with transfers.
Auto is the default transfer type, and sends files in the mode specified for each file's extension. All extensions are sent in binary mode unless they are listed in GlobalOptions > ASCII Types.
You can specify the transfer type for a particular site in your Site Manager under its Site Properties > Type tab.