hi,
look at this post
msdn.microsoft.com/.../hh168530(v=nav.71).aspx (NAV 2009)
....
"Upgrades to the newest Windows collation. Utilizing SQL collations for the database is no longer supported in Microsoft Dynamics NAV 2013 R2. If your database has been using a SQL collation, or an out-of-date Windows collation, the development environment will offer to perform a collation upgrade alongside the Unicode upgrade"