SQLServerCE

Estoy intentando acceder a una base de datos y me da el situiente
error:

="You are trying to access an older version of a SQL Server Compact
Edition database. If this is a SQL Server CE 1.0 or 2.0 database, run
upgrade.exe. If this is a SQL Server Compact Edition 3.0 or later
database, run Compact / Repair. [ Db version = 3505053,Requested
version = 3004180,File name = F:\\dotNET projects\\Word Learner\\bin\
\Debug\\Words.sdf ]"


Programo con VS2008 y windows mobilie 6 no entiendo porque me da
esto se supone que la version de la bbdd es la 3.5..

gracias