My repository is broken

I really like Subversion. I have a little repository for my HTML CD Browser
project. My repository is currently broken and I can't fix it myself.

I did this :-
>svn ci -m "add Images"
Adding include\images
Adding (bin) include\images\desc.gif
.....
Adding (bin) include\images\vertical_right.gif
Transmitting file data ......................
svn: Commit failed (details follow):
svn: Can't remove '/home/svnroot/db/transactions/88-1.txn':
The process cannot access the file because it is being used
by another process.
------

After that :-
>svn status
! .
! include
A include\images
....
A include\images\oss_07.gif

>svn ci -m "add Images"
Adding include\images
svn: Commit failed (details follow):
svn: File already exists: filesystem '/home/svnroot/db',
transaction '89-1', path '/chantra/src/include/images'

>svn update
svn: Failed to add directory 'include/images': object of
the same name already exists
-----

I no longer be able to use the repository.
I try (guess) 'svnadmin rmtxns /home/svnroot 89-1'.
But it says 'svn: No such transaction'
What should I do?

--
_/|\_ Samphan Raruenrom.