VisualSVN problem (svn:externals)

(sorry for my English)
I have a problem... Look at screenshot. There is only 1762 revision. But TC server tries to get log for revisions 1763...1764. Why? Result = server cannot get sources from VisualSVN server... =(
May be there is some cached info (some time ago this file - FixedAllocator - was a part of main repository,but now it live in separate repository and linked to main repo via svn:externals)?
The root of problem is 'svn:externals' (repository without them works).

TortoiseSVN works fine. No any errors.
P.S. See SVN debug log in attachment.