mysqldump output rejected by mysql client

[John Nietzsche]

Dear friends,

i am in need to migrate a database between two mysql server. The server source is running mysql 4.0.18-log, the destination server is running mysql 5.0.51a-log.

I dumped the database (in the server source) using mysqldump utility. The command i issued in de source sever was:
robigo$ mysqldump -u root -probigoroot genweb > s.sql

It worked alright, but when i try to restore (s.sql) in the server i, mysql (client utility) complains on error and exit, here is the output.

robigo$ mysql -u jpaulo -paivALF genweb < genweb
ERROR 1005 (HY000) at line 11: Can't create table './genweb/contigs.frm' (errno: 150)
robigo$


I am very confused, because the output generated by mysqldump it is refused to be loaded in a new server.

What is my fault??

Thanks in advance.