How can I use the cdrom drive and A drive. I can use it to install linux, but i can't use it in xwindows. Please help..

Mount them first, you should have a directory name "/mnt". Inside that directory, if they do not already exist, create two directories, mine are called "floppy", and "cdrom". Next, mount the cdrom drive onto the cdrom directory you just created: # mount /dev/hda6 /cdrom substitute /dev/hda6 for whatever the device file name of your cdrom is. Do the same for the floppy. You can then cd to the mount point and access them. After performing this, the file manager can also see the contents. To make these permanent, you need to add the lines to your /etc/fstab file, so next time you boot, they mounts will still be there.

Thank you for your help. but do I have to mount and unmount every time I want to change cd.

Yes, you have to mount every time you want to use the cd-rom or the floppy drive. Once it is in the fstab file al you have to do is type mount /mnt/cdrom. In XWindow go to the programs menu and then to the admin. menu. In there is a program that will mount and unmount your drives automatically. I am using RH5.1 and the program is called File System Mount. I hoope that this is of some use to you.