How to install Keyboard and Help on WM 5.0 device??

Hi, I have purchased the LingvoSoft Dictionary 2006 English <-> Hebrew for Pocket PC (version 3.1.66) and have installed the three CAB files on my Samsung i730 WM 5.0 Pocket PC. The software works fine, but the Keyboard CAB and the Help CAB do not seem to install. According to your description of the software, it is wm 5.0 capatible. Can you suggest anything?

Dear Freddie,

Please try to deselect the Hebrew keyboard from the list using this application
ftp://81.3.156.146/kbd_util.cab
You just need to download this file, transfer it to your PDA and launch it just tapping on it.
This is a self extract file and the program will be installed after you tap on it.

You will get it in the Programs tab.
Once it's done please launch it on your PDA and select Hebrew keyboard from the list.

After that please download the Hebrew keyboard at
http://www.lingvosoft.com/main.jsp?do=Lingvosoft.com-support-keyboard

Pleas perform the same as for the first cab file.
Once it's done please perform the soft reset and launch the software.