This is a "customer to customer" forum and is *not* an "official" support tool. People answer posts here when they feel they have something helpful to say. You can always contact DreamHost support by using the Control Panel. By doing that you will be contacting people who have an obligation to respond to you, to try to answer your questions, and try help you with your problem (they are paid to do so). 
I read your post, several times, but you didn't provide enough clear information for me to have anything to offer you. That said, since you seem to be feeling neglected, I'll make the following responses:
In reply to:
I started to get internal errors nowadays. Firstly I ignored thinking that it wouldn't be any more. But I get this error over and over which made me sick. Why is this, any ideas ?
I'm sorry you are having trouble. In order to help you, I need to have some idea of what kind of error you are getting other than "internal errors". Do you mean "Internal Server Error - 500", and if so, what do your error logs say (you can view them from the shell at /home/yourusername/logs/yourdomainname or you can download them for inspection via ftp)?
In reply to:
when I open the site (based on wp) , no problem happens. But while opening board (based on smf) it gives that internal error.
Looking at your site (http://www.minare.net/), I have not been able to see any error, either in your WordPress served pages *or* in your SMF forums (http://minare.net/forum/).
The site works fine for me. You might note that I could only check this by viewing your profile to see your site's address - if you are talking about a different site, I have no way to check it as you did not include your site's url in your post. It is *always* helpful , if at all possible, to provide a link so others can try to see your problem.
Please try to provide more specific information about your error(s) (the exact wording of any error messages, at least) and the url that is generating the error.
Please look in your error logs, and let us know what is reported there when an error occurs. If you do these things, others *may* be able to help you, or they may not, but at least you will improve your chances of getting a response.
Additionally, sarcasm ("Perfect Support ..Thanks!") rarely is well received and is probably not a good idea in the future if you really want someone to help you. Everyone here is volunteering their time for free when they respond to you, and many are likely to just ignore you when/if they feel you might be unpleasant or if they have a hard time understanding your problem (myself included!) 
--rlparker