I am trying to copy a database from one system to another,taking a backup and then restoring it from a shared folder.But it is not working properly.The 2 systems have different versions of DB2.Is it because of this that i cant copy a database.is there any other way to do this?

You can restore a backup from windows to windows, UNIX to UNIX, or Linux to Linux. But you cannot restore a backup from UNIX to Windows, etc.

I don't think you can restore a backup to a lower level DB2 (8 to 7), but you can restore to a higher level if it is within one release level (7 to 8).