[LemonPOS-general] Cannot select a product

[SON T. <so...@ya...>]

Hi all,
I am a newcommer for this list. So sorry if the answer for my question is somewhere out there.
I just install LemonPos 0.9.4 on Fedora 15 with kde GUI. I can observe the following things:
-After adding a product via Squeeze, when I want to modify them, on clicking on the product, I can recall the detailed editing window for that product, but all the information given before are not initiallized properly (they are empty). Only the BarCode is set to the correct value
-More serious, passing to lemon GUI, I can see all the products I put via Squeeze,  but I can not select any of them (by either click on the icon or manualy compose the barcode)
DId I miss something in installing process? How can I solve the 2 fondemental  problems?
Thank you very much for your help
Son