I am getting a strange issue in publishing phase. Publishing queue shows success message but only a few pages are not actually copied to my IIS directory. lots of other pages published in the same transaction works well.

I am getting a strange issue in publishing phase. Publishing queue shows success message but only a few pages are not actually copied to my IIS directory. lots of other pages published in the same transaction works well.

I'm using the core service to perform the publishing using the following code:

client.Publish( new[] { page.Attribute( "ID" ).Value }, pubData, new[] { publishingTargetID }, PublishPriority.High, null );