Why? What to do? Below information from status window

>Host: www.pco.de
File: /download/?url=%2Fdata%2Fproduct%
>2FBR_DC1600E_0410.pdf
>Name: C:/My Web 
Sites/pco/www.pco.de/download/indexf0e8.html
>ContentType: application/pdf
>StatusCode: 200 (OK)
>InternalStatus: 1 (receiving)
>StatusMessage: OK
>HTTP/1.1: no
>ChunkMode: no
>TestMode: no
>HeadRequest: no
>NotModified: no
>WriteToDisk: yes
>LocalFile: no
>Size: 56501
>TotalSize: 152980