Thanks for replay, you are right I'am a fool to forget back-up my database.
I'ts my fault and so I have to start over again.
First fault is found, also you have right that I must setting the default language on English and now it's working ok.
Now please support for input the Dutch language file.
I have included it here, so you can see what I have make now.
My question is how I now can put this file in the database.
I have try it to do it with the install script what is included photopost but that gives the problems.
I hope you can tell me what I now must do.
Thanks for support!