troubleshooting 1045 connection for master/slave replication (no replies)

hello to all,

I have two sets of master/slave replication set ups.

first set went through replication procedures setting master then slave - started slave - slave connected and replication began - no problem.

second set identical set up to the first but on start up of slave - slave status:

Last_IO_Errno: 1045
Last_IO_Error: error connecting to master 'repl_user@drupdbprod01.asu.edu:3306' - retry-time: 60 retries: 39

first of all same repl_user on both sets
same password on both sets

same grant statements for repl_user on both sets

On the non-connecting slave - I have done a stop slave, reset slave all, complete rebuild of change master to master_host,master_user,master_password,master_log_file,master_log_pos
start slave

and the same error as above.

I can use the repl_user at the command line - mysql -urepl_user -p -h master - and I connect - no problem
I can telnet master 3306 - connect no problem

Are there any more steps that I can use to trace this problem?

Thanks