Could not access/create a database on a NFS mount / Please help to fix that

Hello, I'm using INFORMIX-SE Personal Edition Version 7.25.TC3 on Windows 2000 (NTFS). 1.If I run DB-Access, choose "connect to" server : LOCAL, and after that choose database "test" it works. 2.If I run DB-Access, choose "query-language" and try to connect to the same database, the engine generates the message: 957: Could not access/create a database on a NFS mount The same error appears if run dbexport and dbimport utilities: dbexport test Please help. Thank you, Adrian