After reading carefully your posts and with help of my brother, I finally fixed the issue I had mentioned in my previous post. There were some errors in the downloaded package which resulted in this problem. I let Bittorrent check my package and it fixed the errors. Then I copied all the items once again in my N900. And I now can search for almost everything.

I love this apps and want to say thanks to all of you who make this wonderful thing for our N900.

By the way, if some of you have the package for dewiktionary and Vi wikipedia?