Read only jffs2 filesystem

[Munro Biswal]

Iam using a 6 MTD partition structure wherein i have two jffs2 
    filesystems and when i boot up, it  mounts the filesystem as  
    readonly.Even if i reboot my board, i get the root filesystem to be 
    mounted readonly.
    I cannot write anything to the filesystem
    What could be the problem??
    

Thanks in advance!
Regards,
Munro.