Welcome to the forums SanandaA!
I don't own, nor have I seen the particular plane you are talking about but most propellers are attached with prop collet adaptors or prop savers. I think this video will probably help you with the prop collet which I believe is most likely what you are dealing with.
http://www.youtube.com/watch?v=94pgMkWW0oM
Also, as an IT professional, I would recommend removing your email address from your post (click on edit below your post), while Flite Test is generally a safe place with great people, posting your email address anywhere on the web is typically a bad idea. It opens you up for loads of spam and possible malware. The forums exist not only as a two way communication but also as a reference for other people who read and learn something even if they choose not to contribute so by emailing you I would be depriving the community and possible others who are in your scenario of valuable information.
If you wish to speak privately, the forums also have a great private message functionality which is a great alternative to email in many cases.
I hope that info helps and you can move forward in this great hobby/addiction!