Firebird's SQL's Substring function not working

I created a view on a machine using the substring function from Firebird, and it worked. When I copied the database to a different machine, the view was broken. This is the way I used it:

SELECT SUBSTRING(field FROM 5 FOR 15) FROM table;

And this is the output on the machine that does not accept the function:

token unknown:  FROM

Both computers have this configuration:

• IB Expert version 2.5.0.42 to run the queries and deal with the database.
• Firebird version 1.5 as server to database.
• BDE Administration version 5.01 installed, with Interbase 4.0 drivers.

Any ideas about why it's behaving differently on these machines?