output of webservice garbelled

A collegue works with soap-ui 2.0.2 and i work with 3.6.1. My collegue has exported a project and i have imported it. When he performs a test to the webservice within the project the output looks ok, when i perform the same test the output is not readable.
Does anyone have any tips what i have to change to get a readable output.

The http header i get back from the webservice looks like this:

HTTP/1.1 200 OK Date: Mon, 25 Oct 2010 10:44:35 GMT Server: IBM_HTTP_Server/2.0.47.1 Apache/2.0.47 (Unix) _charset: UTF-8 cache-control: no-cache, must-revalidate, max-age=0 pragma: no-cache content-encoding: deflate transfer-encoding: Chunked content-type: text/xml;charset=UTF-8 content-length: 640

and the rest of the response like this:

¬TMsÚ0 ý+ŒïX6t’�Qœ àth 1…Þ2Â^ˆˆ-y$ ‡þú®mp€BÛC‡‹Ø÷aí“´ôö#‰ kPšKqc¹¶c5@„2âbyc}ŸÜ7¯¬[� £»qÓ N¯}±†X¦Ð@™Ð×»ú�õfLzMˆ ß aÚFXK–ÚR-I± ° k+ýмVåynçí’Ür —üxz J£& Ú0 §*ú»ÊÚÛpWF �¢²7 ¼ê4|ˆ™0Å¢Ï ½±ó 6[”f Þ_Ÿ3P›’uÄ(ÑQfÒÌl7#t½ Ü„­¥`ÊÎa®A­9îÙ£�\›Ñ¢—ós†>—•ÙAWšÃ b;” A�àÖÏê #üLO ÃBãÑAä¹ÍáÕó]·C þ¡(í3“%> �â«5Š=Jþ€!4d,™‚6|YTfþËà "$, ƒ$•Êà5iL /} É…|ç·ˆŠOxN‡´ZxL®Sò�ÐB0V<ajã'i,7