Login Issues

Hi,
  We've got an issue where we are unable to login into TortoiseSVN.
  It was working fine till we rebooted the server running tortoiseSVN.
  Its running on WinXP.
 When I try to login I get the following error:
   <D:error>
<C:error/>
<m:human-readable errcode="160029">
Could not open the requested SVN filesystem
</m:human-readable>
</D:error>

 All the users currently are unable to checkin checkout. Even the web
interface to look for the files also asks for the username password but ends
up with the above error.
 Any help for the above mentioned issues would be greatly appreciated.
 Thanks
-Z

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