The all famous mod_rewrite issue

[eluser]selman555[/eluser]
[quote author="Jeroen Schaftenaar" date="1342557797"][quote author="selman555" date="1342550731"][quote author="Jeroen Schaftenaar" date="1342550403"]Mod_rewrite is a web server issue, try looking at those...[/quote]
Not sure what I should look at.
When I started my project the first time, I got it working on xampp and on the domain.
Now I don't remember what settings I have to change in order for mod_rewrite to work with xampp.[/quote]

In the apache log files, there it will say exactly why it gives the 500 error![/quote]
I checked the apache logs, but there's no reference to the 500 errors.
Recently, I found out that I can access all of my pages using the index.php suffix. Pretty stupid of me not to check that first, so now the only problem left is mod_rewrite.
the index.php should be rewritten, but now I always get the object not found error.
The only page that does work without the index.php suffex in my homepage or indexpage...

Any suggestions on that?