HardDiskDrive shown as CDROM, Plz help

Hai there,
  I am Sharmi.... Have a Pentium 4 system with 40GB HardDisk. I am
using both Windows 98 and Windows XP. Till last week, my system showed
3 harddisk drives(C,D,E) and 2 CD drives (F-CDROM and G-CD R/W) in 98.
But it showed 4 Harddisk drives(C,D,E,F) and 2 CD drives (G-CDROM and
I-CD R/W) in XP.
  But, now it shows the E drive as CD drive in 98. When the Performance
tab is watched in Properties, The following details are displayed.
  Memory : 224.0 MB of RAM
  system resources: 75%-82% free(not simulataneously)
  File System :Some disks are using MS-DOS file system.
And the problem description is shown as Drive-E is using MS-DOS
compatibility mode file system.

While the system Boots, Drive E is shown as Driver CDROM unit 0 and
Drive F as CDROM unit 1.

When I tried to access the files in DOS mode, e:/ allows to enter into
the E drive, but when Dir command is given to list the files,
  "Not ready reading Drive R. Abort,Retry,Fail?"
message is displayed.

Initially, All the drives, including E used the FAT32 file system.
Now the system performance is completely decreased for the E-drive and
also, has slowed down. What shd I do to solve this?
  It makes me mad due to the decreased spped, when I swithchon my
system. Hope ur kind suggestions will turn me bright.
  I tried to update the drivers, but in vein. Waiting for ur
suggestions.
Plz, mail to sharmi_junet.TakeThisOut@operamail.com if u have any suggestions or
post a followup.plz
Thanks in Advance
-Sharmi<!-- ~MESSAGE_AFTER~ -->