up-to-date check failed from a lower revision to higher revision

[Antony Paul]

Hi all,
    I am new to CVS. I am using the cvs command line client in Linux. I have
one file whose status is as follows
cvs status: Examining .
===================================================================
File: one.txt           Status: Locally Modified

   Working revision:    1.4.1.3 Sat Jul 10 08:53:39 2004
   Repository revision: 1.4.1.3 /home/cvsuser/cvsroot/work/base/one.txt,v
   Sticky Tag:          1.4.1
   Sticky Date:         (none)
   Sticky Options:      (none)

   Existing Tags:
        No Tags Exist

    I started with version 1.1. I created a new version using the command

    cvs commit -r 1.4.1 one.txt

        Then I modified the file and committed several time using

    cvs commit one.txt

    Now it is in revision 1.4.1.3. The error occurred when I committed with
the following command
     cvs commit -r 1.5 -m '1.5' one.txt
    What is wrong with it. I am the only person who works with this file and
repository. I tried cvs update -C one.txt. Still it is giving error.

    Thanks in advance.

    rgds
    Antony Paul