Create new review request failed with error - 'Login to the SCM server failed.' Can anybody help ?

[Shridhar Vishwakarma]

Hi,

I setup ReviewBoard yesterday. My repository is over VPN which is of
the type -svn. Now if try to create new review request I am getting
error -

'Login to the SCM server failed.'

# Authentication : SVN authentication is provided in Repository
details,
# Repository path: svn://XXXX/XXXX ('Repository Root' which i get
with 'svn info' command in the checked out directory)
# Repository Type : Subversion

Can anybody help me to resolve this problem.. ? How to debug the
error ? I didn't get any error log in the Apache log....

Thanks,
Shridhar