Gracenote, exception database in C# sample

When I try to run sample in GNSDK for C#, an exception fire for enable local database sqlite. In GNSDK log i see this

Local Lookup Initialize: Version 3.07.0.2861  Built 2014-10-28 01:46-0700
2014-12-29 11:26:08.406     DEBUG       GNSDK Local     0x00001840  [api_trace] gnsdk_lookup_local_get_build_date
2014-12-29 11:26:08.519     DEBUG       GNSDK Local     0x00001840  [api_trace] gnsdk_lookup_local_get_version
2014-12-29 11:26:12.371     DEBUG       GNSDK Local     0x00001840  [api_trace] gnsdk_lookup_local_storage_location_set( gnsdk_lookup_local_gdball, ../../../sample_db )
2014-12-29 11:26:12.372     DEBUG       GNSDK Local     0x00001840  [api_trace] lookup_local_storage_location_set( gnsdk_lookup_local_storage_primary_identifier, gnsdk_lookup_local_gdball, ../../../sample_db )
2014-12-29 11:26:14.460     DEBUG       GNSDK Local     0x00001840  [api_trace] gnsdk_lookup_local_get_build_date
2014-12-29 11:26:14.506     DEBUG       GNSDK Local     0x00001840  [api_trace] gnsdk_lookup_local_get_version
2014-12-29 11:26:20.531     DEBUG       GNSDK Local     0x00001840  [api_trace] gnsdk_lookup_local_storage_info_count( gnsdk_lookup_local_gdbmdata, gnsdk_lookup_local_gdb_version, 5DCE53C )
2014-12-29 11:26:20.532     DEBUG       GNSDK Local     0x00001840  [api_trace] lookup_local_storage_location_get( gnsdk_lookup_local_storage_primary_identifier, gnsdk_lookup_local_gdbmdata, 5DCE524 )
2014-12-29 11:26:20.532     DEBUG       GNSDK SQLite    0x00001840  sqlite_storage_helpers.c[412]   Storage connection: gn_mdata.gdb
**2014-12-29 11:26:20.533   WARNING     GNSDK Local     0x00001840  lookup_local_storage_helpers.c[219] Failed to open storage group: 'gn_mdata.gdb'**
2014-12-29 11:26:20.533     DEBUG       GNSDK Manager   0x00001840  [api_trace] gnsdk_manager_error_info

Do you have some idea to help me ?