DataSource Directory combined with DataSource Excel

i am trying to loop a directory containing xml test files, that's what i did:
1) DataSource Directory with Filename Filter *.xls and Encoding (UTF-8|none) defined
2) Properties added named ExcelData.
3) Run Test Step DataSource Directory... now, the files are listed in the column ExcelData (i think there's binary data shown, right?)
4) DataSource Excel with File: ${ExcelDirectory#ExcelData} defined
5) Added some according properties
6) Run Test Step DataSource Excel...

... and following error pops up:

java.io.FileNotFoundException: C:\Program Files\eviware\soapUI-Pro-3.0.1\bin\ÐÏ à¡± á


is that a bug or are my datasources configured the wrong way?
thanks for any help.