problem of save screenshot in iphone using prime31 plugins

Hello everyone,

I want to save screenshot of game in iphone gallery . but when i click on save button it saved previous screenshot . please help me it is urgent for me.

string GetDocumentsPath()
{

string DocumentsPath;

	DocumentsPath = Application.dataPath.Substring (0, Application.dataPath.Length - 5); 
	DocumentsPath = DocumentsPath.Substring(0,DocumentsPath.LastIndexOf("/"));
	return DocumentsPath + "/Documents/";

}

public void SaveWallpaperPrompt()
{

	StartCoroutine( EtceteraBinding.takeScreenShot("te.png") );
	
	saveImage(2f);
	if(File.Exists (GetDocumentsPath()+"te.png"))
	{
		Debug.Log ("------------------- File Exits");
		EtceteraBinding.saveImageToPhotoAlbum(GetDocumentsPath()+"te.png");
	}
		else
	{
		Debug.Log("------------ File NOT FOUND");
	}
	

}

 IEnumerator saveImage(float tm)
{
	
	
	yield return new  WaitForSeconds(tm);
	

	
}

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