How can i extract test data wich are defined in RQM with RPE

This tutorial is a little older, but its still valid and should give you an idea of how to start to create a RPE template for RQM:

http://www.ibm.com/developerworks/wikis/display/rpe/RPE+-+RQM+Tutorial+v3

I should have also noted that RQM 4.0.x (I forget exactly which 4 version was the first release) also ships sample RPE templates for use within RRDG (the RPE component that is now embedded in RQM that allows you to generate documents from RPE templates that have been uploaded to the RQM server).  Definitely take a look at these samples.  You will find them on the "All Downloads" tab under the "Extras" section from the RQM download page:

https://jazz.net/downloads/rational-quality-manager/releases/4.0.2?p=allDownloads

There is also some help in the CLM Information Center:
http://pic.dhe.ibm.com/infocenter/clmhelp/v4r0m2/index.jsp?topic=%2Fcom.ibm.rational.rrdg.usage.doc%2Ftopics%2Ft_author_docstyle_report.html

 if you success output the testdata that call "datapool" in rpe please