I made a transportable backup in FB2.0:
gbak -v -t -user SYSDBA -password masterkey alo.gdb alo.gbk

I try to restore the export in FB1.5:
gbak -c -r -v -t -user SYSDBA -password masterkey alo.gbk alo.gdb

Then there is a version problem:
gbak: opened file c:\data\interbase\alo.gbk
gbak: transportable backup -- data in XDR format
gbak: backup file is compressed
gbak: ERROR: Expected backup version 1, 2, or 3. Found 7
gbak: Exiting before completion due to errors

Who van help?