1st i must create a file,"dosbox.conf"
Don't do that.
DOSBox creates that file on its own. Don't try to create your own dosbox.conf when you're first starting out.
Also, unless you decide you want to tweak things later on, you don't have to edit the dosbox.conf.
It's convenient to put your mount lines at the end of it, but you can also just type them in at the Z: prompt, which is better when you're testing them out anyway.
If you can't locate the DOSBox.conf that DOSBox created, check here
http://www.dosbox.com/wiki/Dosbox.conf#Creation_and_Location Windows XP
%USERPROFILE%\Local Settings\Application Data\DOSBox\dosbox-{version}.conf
Windows Vista & Windows 7
{system drive}:\Users\{username}\AppData\Local\DOSBox\dosbox-{version}.conf
You may have already seen this, but here are some examples of using the mount command.
http://www.dosbox.com/wiki/MOUNTMy present problem is i have a game
wich installs only 2 files,to a folder,1 is a tiny file
containing information,about the sound,the 2nd is a,(run.bat),file wich runs the game from a cd-rom,and now by using the dosbox,this is very hard to do,i will explain
the game folder,lets name it,<GAME>,now to tell dosbox where
to find it,you must type"mount c c:\game" "(C:),cd game,run"
but the game will not run,because dosbox does not know from
the cd-rom drive,now to tell dosbox,i must write
"mount d d:\ -t cdrom",then mscdex will run then the CD will
play,but to write both,dosbox does NOT take it,this so far
is big big problem,
Have you tried entering the two mount commands from the Z: prompt before trying to run the game?
mount c c:\game
This tells DOSBox that C:\game is your C drive.
What DOSBox sees as C: is what your computer sees as C:\game
Usually a game will have its own folder and not be dumping its files to what it thinks is the C: drive. So I'm wondering if you actually have a folder named C:\game\game
mount d d:\ -t cdrom
That should work if your CD drive is D:
If it is E: then you'd type
mount d e:\ -t cdrom
What game are you trying to run?
With some older games, you can copy the contents of the CD to a folder on your hard drive, then mount that folder as the CD drive in DOSBox.