ok, spokojnie.
zerknąłeś do mysqla co oznacza błąd 121?
http://forums.mysql.com/read.php?22,33999,156491#msg-156491
"This error occurs when a foreign key constraint for the same field exist.
For Me I had product table and subcattable.
In subcattable I had a foreign key constraint of cascade delete on productid in product table.
I renamed both the tables and tried to create fresh product table and
subcattable. Product table was created properly but subcattable gave the
error Can't create table (errno: 121)
I deleted the renamed subcattable. Then it was fineThis error occurs when a foreign key constraint for the same field exist.
For Me I had product table and subcattable.
In subcattable I had a foreign key constraint of cascade delete on productid in product table.
I renamed both the tables and tried to create fresh product table and
subcattable. Product table was created properly but subcattable gave the
error Can't create table (errno: 121)
I deleted the renamed subcattable. Then it was fine"
może pomoże. nadmieniam, że nie jestem guru z mysqla.