Deploy Problem--failed with big files!

As the subject, I want to deploy my program with visual studio 2005 and pocket pc 2003, but failed when it comes with big file(bigger than 1M).
Enviroment vs2005, pocket pc 2003, activesync4.1, .net cf 2.0.
Error message here:
Deployment and/or registration failed with error: 0x8973190e. Error writing file '%CSIDL_PROGRAM_FILES%\SQLCEResultSetSampleCS\Northwind.sdf'. Error 0x8007274c:
Thanks in advance.

AS indeed is not very good with big files, but 1 MB is not big at all. It was able to deploy NETCF V2 which is 5 times that, right?

I suspect your DB is in use and can not be overwritten. May be your application is running in background with open connection or, perhaps, you forgot to close query analyzer?