errors getting in mods installation

[sachin_iam]

Execute Modification     ./Themes/default/index.template.php     Test failed
      1.    Add After    ./Themes/default/index.template.php    Test failed
      2.    Replace    ./Themes/default/index.template.php    Test failed
*    2.    Execute Modification    ./index.php    Test successful
      1.    Add After    ./index.php    Test successful
   3.    Extract Tree    ./pjirc    
   4.    Extract File    ./Sources/Chat.php    
   5.    Extract File    ./Themes/default/Chat.template.php    
   6.    Extract File    ./Themes/default/images/english/chat.gif


these are the errors i am getiing
can anybody please explain...

[kat]

The installer's looking for lines of code that don't exist, or have already been modified by other mods.

You'll need to make the edits, manually, assuming the mods are for the correct version of SMF.

On the mod's page, just below the download link, you'll see a parser.

Select your version of SMF and hit "Parse".

You'll be shown what edits need to be made, there.