Updating Webpage


I try to update an struct through some web pages. The structs holds about 230 bytes of different types. There is no problem when I just read the values to the web, but when I try to update an variable my system seems to crash. When I push the submit button the connection LED turns off and the the webpage will not reload.
Is there anyone out there who has experienced something similarly? And has found an solution… or has some ideas that I can try out…

In advance, thanks