SQLite access to data file via LAN (and x32 and x64)

We are developing Windows applications with SQLite, VisualStudio-2010 with .NET4. The SQLite dll used are :

System.Data.SQLite.dll (for x32 target 1.0.97) 804KB System.Data.SQLite.dll (for x64 target 1.0.97) 1,322KB

Our applications access to the SQLite data files via LAN with "\\PC-Name\C\FolderName\data.db". The x32 version works fine, but the x64 version throughs error messages of "unable to open data file". Local accesses with "C:\FolderName\data.db" work fine for both x32 and x64 version.

Can help ?